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30-2(2x+1)=-13
We move all terms to the left:
30-2(2x+1)-(-13)=0
We add all the numbers together, and all the variables
-2(2x+1)+43=0
We multiply parentheses
-4x-2+43=0
We add all the numbers together, and all the variables
-4x+41=0
We move all terms containing x to the left, all other terms to the right
-4x=-41
x=-41/-4
x=10+1/4
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