.2x+.7(100-x)=5

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Solution for .2x+.7(100-x)=5 equation: 



.2x+.7(100-x)=5

We move all terms to the left:

.2x+.7(100-x)-(5)=0

We add all the numbers together, and all the variables

.2x+.7(-1x+100)-5=0

We multiply parentheses

.2x-0.7x+70-5=0

We add all the numbers together, and all the variables

-0.5x+65=0

We move all terms containing x to the left, all other terms to the right

-0.5x=-65

x=-65/-0.5

x=+130

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