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0.02x+0.7=-0.03x+0.2
We move all terms to the left:
0.02x+0.7-(-0.03x+0.2)=0
We get rid of parentheses
0.02x+0.03x-0.2+0.7=0
We add all the numbers together, and all the variables
0.05x+0.5=0
We move all terms containing x to the left, all other terms to the right
0.05x=-0.5
x=-0.5/0.05
x=-10
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