L=3+w (l=length, w=width)
l=3+x if x is the width
A = 1/2 h(b + x)
2a = h(b + x)
2a/h = b + x
x = 2a/h - b
Answer:
680x + 170
Step-by-step explanation:
calculate the product
4
x170 +170=
680x+ 170
The one is the same everywhere so we ignore it.

Choice B
Hello there!

Explanation:
↓↓↓↓↓↓↓↓↓↓↓↓
First you had to subtract by 7 from both sides of the equation.

Simplify

Then you add by x from both sides of the equation.

Simplify

Divide by 4 from both sides of the equation.

Simplify it should be the correct answer.

Answer⇒⇒⇒x=-2
Hope this helps!
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-Charlie