8.5 Solving Equation with Variables on Each Side
X Finds His Value http://youtu.be/J2TYyUftI8k
Steps to solve multi-step linear equations Collect like terms Move variables to same side of equation. (using the Add/ sub prop of =) Move the constant to the opposite side of the equation (using the Add/ sub prop of =) Solve for x (using the Mult/div prop of =)
Example 1: 2x – 2 = -3x + 3 + 3x 5x – 2 = + 3
Example 2:
Example 3: 6m +5 – 2m = 10 – 3m +16 4m +5 = 26 – 3m +3m 7m +5 = 26 -5
Example 4: -2.2 +0.3z = 3- 0.5z -0.8z +1.3z +1.3z -2.2 +1.6z=3 +2.2
Example 5:
# of DVD’s = x Netflix: 50 + 1.99x Blockbuster: 3.99 x Netflix charges a yearly membership fee of $50 plus $1.99 per DVD rental. The Blockbuster store has no membership fee and charges $3.99 per DVD rental. Write an equation and solve to find the number of DVD’s for which the cost of each would be the same. # of DVD’s = x Netflix: 50 + 1.99x Blockbuster: 3.99 x
Assignment: Page 358 (2-28) even