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4x-28=-7x+63+124
We move all terms to the left:
4x-28-(-7x+63+124)=0
We add all the numbers together, and all the variables
4x-(-7x+187)-28=0
We get rid of parentheses
4x+7x-187-28=0
We add all the numbers together, and all the variables
11x-215=0
We move all terms containing x to the left, all other terms to the right
11x=215
x=215/11
x=19+6/11
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