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0.09(9x+4)=0.81(x+7)-5.31
We simplify the equation to the form, which is simple to understand
0.09(9x+4)=0.81(x+7)-5.31
Reorder the terms in parentheses
+( + 0.81x + 0.36)=0.81*(x+7)-5.31
Remove unnecessary parentheses
+ 0.81x + 0.36=0.81+*(+x+7+)-5.31
Reorder the terms in parentheses
+ 0.81x + 0.36=+( + 0.81x+5.67)-5.31
Remove unnecessary parentheses
+ 0.81x + 0.36=0.81x+5.67-5.31
We move all terms containing x to the left and all other terms to the right.
+ 0.81x-0.81x=+5.67-5.31-0.36
We simplify left and right side of the equation.
-1.1102230246252E-16x=+3.3306690738755E-16
We divide both sides of the equation by -1.1102230246252E-16 to get x.
x=-3
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