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4x+38=2x-138
We move all terms to the left:
4x+38-(2x-138)=0
We get rid of parentheses
4x-2x+138+38=0
We add all the numbers together, and all the variables
2x+176=0
We move all terms containing x to the left, all other terms to the right
2x=-176
x=-176/2
x=-88
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