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2x+4=-8*5x
We move all terms to the left:
2x+4-(-8*5x)=0
We get rid of parentheses
2x+8*5x+4=0
Wy multiply elements
2x+40x+4=0
We add all the numbers together, and all the variables
42x+4=0
We move all terms containing x to the left, all other terms to the right
42x=-4
x=-4/42
x=-2/21
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