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3-0.1(u-10)=0.8(2u-10)
We simplify the equation to the form, which is simple to understand
3-0.1(u-10)=0.8(2u-10)
Reorder the terms in parentheses
3+(-0.1u+1)=0.8*(2u-10)
Remove unnecessary parentheses
+3-0.1u+1=0.8+*(+2u-10+)
Reorder the terms in parentheses
3-0.1u+1=+(+1.6u-8)
Remove unnecessary parentheses
+3-0.1u+1=+1.6u-8
We move all terms containing u to the left and all other terms to the right.
-0.1u-1.6u=-8-3-1
We simplify left and right side of the equation.
-1.7u=-12
We divide both sides of the equation by -1.7 to get u.
u=7.0588235294118
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