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2+4(1+4x)=-90
We move all terms to the left:
2+4(1+4x)-(-90)=0
We add all the numbers together, and all the variables
4(4x+1)+2-(-90)=0
We add all the numbers together, and all the variables
4(4x+1)+92=0
We multiply parentheses
16x+4+92=0
We add all the numbers together, and all the variables
16x+96=0
We move all terms containing x to the left, all other terms to the right
16x=-96
x=-96/16
x=-6
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