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(-1-7x)-(42+6x)=36
We move all terms to the left:
(-1-7x)-(42+6x)-(36)=0
We add all the numbers together, and all the variables
(-7x-1)-(6x+42)-36=0
We get rid of parentheses
-7x-6x-1-42-36=0
We add all the numbers together, and all the variables
-13x-79=0
We move all terms containing x to the left, all other terms to the right
-13x=79
x=79/-13
x=-6+1/13
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