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212x-20+(12x-4+52x)=-13
We move all terms to the left:
212x-20+(12x-4+52x)-(-13)=0
We add all the numbers together, and all the variables
212x+(64x-4)-20-(-13)=0
We add all the numbers together, and all the variables
212x+(64x-4)-7=0
We get rid of parentheses
212x+64x-4-7=0
We add all the numbers together, and all the variables
276x-11=0
We move all terms containing x to the left, all other terms to the right
276x=11
x=11/276
x=11/276
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