100*0.7+0.9*x=0.75*(100-x)

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Solution for 100*0.7+0.9*x=0.75*(100-x) equation:


100*0.7 + 0.9*x=0.75*(100-x)

We simplify the equation to the form, which is simple to understand 
100*0.7 + 0.9*x=0.75*(100-x)

Simplifying:
+70 + 0.9*x=0.75*(100-x)

Simplifying:
+70 + 0.9x=0.75*(100-x)

Reorder the terms in parentheses
+70 + 0.9x=+(+75-0.75x)

Remove unnecessary parentheses
+70 + 0.9x=+75-0.75x

We move all terms containing x to the left and all other terms to the right. 
 + 0.9x + 0.75x=+75-70

We simplify left and right side of the equation. 
+1.65x=+5

We divide both sides of the equation by 1.65 to get x. 
x=3.0303030303

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