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4(1-4a)+2a=102
We move all terms to the left:
4(1-4a)+2a-(102)=0
We add all the numbers together, and all the variables
4(-4a+1)+2a-102=0
We add all the numbers together, and all the variables
2a+4(-4a+1)-102=0
We multiply parentheses
2a-16a+4-102=0
We add all the numbers together, and all the variables
-14a-98=0
We move all terms containing a to the left, all other terms to the right
-14a=98
a=98/-14
a=-7
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