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-5x-4(7x+14)=142
We move all terms to the left:
-5x-4(7x+14)-(142)=0
We multiply parentheses
-5x-28x-56-142=0
We add all the numbers together, and all the variables
-33x-198=0
We move all terms containing x to the left, all other terms to the right
-33x=198
x=198/-33
x=-6
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