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3.4x+1.15=-1.4
We move all terms to the left:
3.4x+1.15-(-1.4)=0
We add all the numbers together, and all the variables
3.4x+2.55=0
We move all terms containing x to the left, all other terms to the right
3.4x=-2.55
x=-2.55/3.4
x=-2.55/3.4
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