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0.28x+4x=(-8.56)
We move all terms to the left:
0.28x+4x-((-8.56))=0
We add all the numbers together, and all the variables
4.28x+8.56=0
We move all terms containing x to the left, all other terms to the right
4.28x=-8.56
x=-8.56/4.28
x=-2
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