0.25x+0.15(100-x)=18

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Solution for 0.25x+0.15(100-x)=18 equation: 



0.25x+0.15(100-x)=18

We move all terms to the left:

0.25x+0.15(100-x)-(18)=0

We add all the numbers together, and all the variables

0.25x+0.15(-1x+100)-18=0

We multiply parentheses

0.25x-0.15x+15-18=0

We add all the numbers together, and all the variables

0.1x-3=0

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

0.1x=3

x=3/0.1

x=30

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