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20-4/(1+7)=x
We move all terms to the left:
20-4/(1+7)-(x)=0
We add all the numbers together, and all the variables
-x+20-4/8=0
We add all the numbers together, and all the variables
-1x+20-4/8=0
We multiply all the terms by the denominator
-1x*8-4+20*8=0
We add all the numbers together, and all the variables
-1x*8+156=0
Wy multiply elements
-8x+156=0
We move all terms containing x to the left, all other terms to the right
-8x=-156
x=-156/-8
x=19+1/2
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