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.8x+19=20
We simplify the equation to the form, which is simple to understand
.8x+19=20
We move all terms containing x to the left and all other terms to the right.
+ 0.8x=+20-19
We simplify left and right side of the equation.
+ 0.8x=+1
We divide both sides of the equation by 0.8 to get x.
x=1.25
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