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1.1x+1.2x-9.8=-42
We move all terms to the left:
1.1x+1.2x-9.8-(-42)=0
We add all the numbers together, and all the variables
2.3x+32.2=0
We move all terms containing x to the left, all other terms to the right
2.3x=-32.2
x=-32.2/2.3
x=-14+7.105427357601E-15/2.3
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