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2.5+x=0.4(10x)
We move all terms to the left:
2.5+x-(0.4(10x))=0
We add all the numbers together, and all the variables
x-(+0.410x)+2.5=0
We get rid of parentheses
x-0.410x+2.5=0
We add all the numbers together, and all the variables
0.59x+2.5=0
We move all terms containing x to the left, all other terms to the right
0.59x=-2.5
x=-2.5/0.59
x=-4+0.14/0.59
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