.9x+.13(100,000-x)=10,000

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Solution for .9x+.13(100,000-x)=10,000 equation: 



.9x+.13(100.000-x)=10.000

We move all terms to the left:

.9x+.13(100.000-x)-(10.000)=0

We add all the numbers together, and all the variables

.9x+.13(-1x+100)-10=0

We multiply parentheses

.9x-0.13x+13-10=0

We add all the numbers together, and all the variables

0.77x+3=0

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

0.77x=-3

x=-3/0.77

x=-3+0.69/0.77

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