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5(4z+1)-9=136
We move all terms to the left:
5(4z+1)-9-(136)=0
We add all the numbers together, and all the variables
5(4z+1)-145=0
We multiply parentheses
20z+5-145=0
We add all the numbers together, and all the variables
20z-140=0
We move all terms containing z to the left, all other terms to the right
20z=140
z=140/20
z=7
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