algebra 1
posted by shaniqua on .
A rectangle has a perimeter of 12x + 20 and a width of 2x + 8. What is the length of the rectangle?

let the length be l
2l + 2(2x+8) = 12x+20
2l = 8x + 4
l = 4x + 2 
how did you get right to.... 2l= 8x + 4 ?

I skipped what I thought was an easy simplification ...
2l + 2(2x+8) = 12x+20
2l + 4x + 16 = 12x + 20
2l = 12x + 20  4x  16
2l = 8x + 4