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1.2x+1.6x=-0.9x
We move all terms to the left:
1.2x+1.6x-(-0.9x)=0
We add all the numbers together, and all the variables
2.8x-(-0.9x)=0
We get rid of parentheses
2.8x+0.9x=0
We add all the numbers together, and all the variables
3.7x=0
x=0/3.7
x=0
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