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42x+5x-15=3x+135
We move all terms to the left:
42x+5x-15-(3x+135)=0
We add all the numbers together, and all the variables
47x-(3x+135)-15=0
We get rid of parentheses
47x-3x-135-15=0
We add all the numbers together, and all the variables
44x-150=0
We move all terms containing x to the left, all other terms to the right
44x=150
x=150/44
x=3+9/22
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