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58=28+7x
We move all terms to the left:
58-(28+7x)=0
We add all the numbers together, and all the variables
-(7x+28)+58=0
We get rid of parentheses
-7x-28+58=0
We add all the numbers together, and all the variables
-7x+30=0
We move all terms containing x to the left, all other terms to the right
-7x=-30
x=-30/-7
x=4+2/7
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