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70+0.30x=30-0.40x
We move all terms to the left:
70+0.30x-(30-0.40x)=0
We add all the numbers together, and all the variables
0.30x-(-0.4x+30)+70=0
We get rid of parentheses
0.30x+0.4x-30+70=0
We add all the numbers together, and all the variables
0.7x+40=0
We move all terms containing x to the left, all other terms to the right
0.7x=-40
x=-40/0.7
x=-57+0.1/0.7
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