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190=-7x+315
We move all terms to the left:
190-(-7x+315)=0
We get rid of parentheses
7x-315+190=0
We add all the numbers together, and all the variables
7x-125=0
We move all terms containing x to the left, all other terms to the right
7x=125
x=125/7
x=17+6/7
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