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2+3(z+7)=-5
We move all terms to the left:
2+3(z+7)-(-5)=0
We add all the numbers together, and all the variables
3(z+7)+7=0
We multiply parentheses
3z+21+7=0
We add all the numbers together, and all the variables
3z+28=0
We move all terms containing z to the left, all other terms to the right
3z=-28
z=-28/3
z=-9+1/3
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