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2(x*7)=28
We move all terms to the left:
2(x*7)-(28)=0
We add all the numbers together, and all the variables
2(+x*7)-28=0
We multiply parentheses
14x-28=0
We move all terms containing x to the left, all other terms to the right
14x=28
x=28/14
x=2
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