To solve more complicated equations that have variables on both sides.

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Presentation transcript:

To solve more complicated equations that have variables on both sides. Ch 3.5 Objective: To solve more complicated equations that have variables on both sides.

Review x + 6 = 10 2x + 6 = 10 2(x + 6) = 10 2(x + 6) = 10 + x Billie is 3 years less than Sally. If Sally is 12 years old, how old is Billie?

3.5 Homework (#1) 5x – 3 = 13 – 3x + 3x + 3x 8x – 3 = 13 + 3 + 3 8x = 16 8 8 x = 2 Inverse Property of Addition w/Variable Inverse Property of Addition Inverse Property of Multiplication

3.5 Homework (#2) - 4c – 11 = 4c + 21 + 4c + 4c - 11 = 8c + 21 - 21 - 21 - 32 = 8c 8 8 Inverse Property of Addition w/Variable Inverse Property of Addition Inverse Property of Multiplication - 4 = c

there is NO SOLUTION for x! TRICKY ones x= x x+ 1 = x + 1 2x = 2x x can be ANY REAL NUMBER! 4) x + 1 = x 5) x + 2 = x + 1 there is NO SOLUTION for x!

3.5 Homework (# 23) Two thirds of a number reduced by 11 2 * ( n - 11 ) 3 is equal to 4 more than the number = 4 + n 2 (n – 11) = 4 + n

3.5 Homework (#26) Find the length and width of a rectangle whose perimeter is 24 P = 24 and the length is 3 inches greater than its width. L = 3 + w Formula: P = 2L + 2w 24 = 2(3 + w) + 2w