Answer:
Step-by-step explanation:
Area of the rectangle = (3x + 7)(2x- 2)
= 3x(2x - 2) + 7*(2x - 2)
= 3x*2x - 3x*2 +7*2x - 7*2
= 6x² <u>- 6x + 14x</u> - 14
= 6x² + 8x - 14
9
Raise 3 to the power of 2.
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2
4x+3=x+9
4x-x=9-3
3x=6
x=6/3
x=2