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10x+25x+75+290-(10x=15)=6.50
We move all terms to the left:
10x+25x+75+290-(10x-(15))=0
We add all the numbers together, and all the variables
35x-(10x-15)+365=0
We get rid of parentheses
35x-10x+15+365=0
We add all the numbers together, and all the variables
25x+380=0
We move all terms containing x to the left, all other terms to the right
25x=-380
x=-380/25
x=-15+1/5
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