CPM Homework Banner
4-13.

Flip subtraction to addition.

Remove zero pairs.

Combine like terms.

Add 4 to both sides.

Subtract x from both sides.

Divide by 2 on both sides.

Right now the equation is:

x + 1 + −2 −(−2x+3) = x + 5 −(2 + −1)

x +1 + (−2) + 2x + (−3) = x +5 + −2 + 1

3x + (−4) = x + 4

3x = x + 8

2x = 8

x = 4

Substitute your answer from part (a) into the original equation.