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0.5x+0.7=-0.3x-0.9
We move all terms to the left:
0.5x+0.7-(-0.3x-0.9)=0
We get rid of parentheses
0.5x+0.3x+0.9+0.7=0
We add all the numbers together, and all the variables
0.8x+1.6=0
We move all terms containing x to the left, all other terms to the right
0.8x=-1.6
x=-1.6/0.8
x=-2
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