(10x+5)4 = 30x + 3x + 6x +30
40x + 20 = 39x + 30
X = 10
perimeter of the square= 420
perimeter of the triangle= 420
The answer is the first one -29, -19, -9, 1
the answer i got is in the image below
Hello there!
m = 10x - x, solve for x.
First, we need to combine like-terms.
10x - x = 9x.
We now have:
m = 9x
Divide both sides by 9 to solve for x.
x =

I hope this helps!