Solve Equations With Variables on Both Sides Section 1.5 Advanced Algebra 1

Steps to Solve Equations with Variables on Both Sides 1) Simplify each side Get rid of double Negatives Get rid of fractions Distribute Combine Like Terms 2) Move variables to same side “Smaller to the bigger” 3) Solve by using INVERSE Operations bkevil

Use Steps to Solve Equation: -3x + 4 = 5x – 8 Get variables on same side of equation – use inverse operation (add 3x) +3x +3x 4 = 8x - 8 Solve 2 step equation + 8 +8 12 = 8x 8 8 x = 3/2

Use Steps to Solve Equation: 2(x + 7) + 3 = 5x - 1 distribute 2x + 17 = 5x - 1 Combine like terms -2x -2x Get variables on same side – use inverse operation 17 = 3x - 1 +1 +1 Solve 2 step equation 18 = 3x 3 3 x = 6

Use Steps to Solve Equation: 4(1 – 2x) = 4 – 6x Get rid of ( ) -- distribute +8x + 8x Get variables on same side – use inverse operation (add 8x) 4 = 4 + 2x - 4 - 4 Solve 2 step equation 0 = 2x 2 2 x = 0

Use Steps to Solve Equation: 9 + 5x = 5x + 9 Get variables on same side of equation – use inverse operation (subtract 5x) -5x -5x 9 = 9 When solving, if you get a TRUE STATEMENT, then that means that any real number works. Infinite Solutions

Use Steps to Solve Equation: 6x – 1 = 6x – 8 Get variables on same side of equation – use inverse operation (subtract 6x) -6x -6x -1 = - 8 The variables zeroed out and remaining is a false statement where a number is equal to a different number, so there will be no number that will work in the equation. x = no solutions The solution is no real numbers or empty set

5) Solve 3 - 2x = 4x – 6 + 2x +2x 3 = 6x – 6 + 6 + 6 9 = 6x 6 6 Clear the fraction – multiply each term by the LCD Simplify Add 2x to both sides Add 6 to both sides Divide both sides by 6 Check your answer 3 - 2x = 4x – 6 + 2x +2x 3 = 6x – 6 + 6 + 6 9 = 6x 6 6 or 1.5 = x

Solve the equation. Check your answer. 0.5 + 0.3y = 0.7y – 0.3 1: Move variable to one side 0.5 + 0.3y = 0.7y – 0.3 –0.3y –0.3y 2: add/subtract 0.5 = 0.4y – 0.3 +0.3 + 0.3 3: Multiple/divide 0.8 = 0.4y 2 = y

Simplifying Each Side Before Solving Equations 4 – 6a + 4a = –1 – 5(7 – 2a) D: Distributive P. 4 – 6a + 4a = –1 –5(7 – 2a) 4 – 6a + 4a = –1 –5(7) –5(–2a) 4 – 6a + 4a = –1 – 35 + 10a C: Combine like terms 4 – 2a = –36 + 10a M: move variable to One side +2a +2a 4 = -36 + 12a

4 = -36 + 12a + 36 +36 40 = 12a A: add/subtract M: multiply/divide

Solve the equation. Check your answer. D: Distributive Property M: Move variable to one side A: Add/subtract 3 = b – 1 + 1 + 1 4 = b

Solve the equation. 1. 2m – 6 + 4m = 12 ANSWER 3 2. 6a – 5(a – 1) = 11 ANSWER 6

Create an equation, then solve the equation. 3. A charter bus company charges $11.25 per ticket plus a handling charge of $.50 per ticket, and a $15 fee for booking the bus. If a group pays $297 to charter a bus, how many tickets did they buy? ANSWER 24 tickets

Solve the equation. 1. 8g – 2 + g = 16 ANSWER 2 2. 3b + 2(b – 4) = 47 11 ANSWER 3. –6 + 4(2c + 1) = –34 –4 ANSWER

4. (x – 6) = 12 2 3 24 ANSWER 5. Joe drove 405 miles in 7 hours. He drove at a rate of 55 miles per hour during the first part of the trip and 60 miles per hour during the second part. How many hours did he drive at a rate of 55 miles per hour? 3 h ANSWER