0.3x+0.4(18-x)=7

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Solution for 0.3x+0.4(18-x)=7 equation: 



0.3x+0.4(18-x)=7

We move all terms to the left:

0.3x+0.4(18-x)-(7)=0

We add all the numbers together, and all the variables

0.3x+0.4(-1x+18)-7=0

We multiply parentheses

0.3x-0.4x+7.2-7=0

We add all the numbers together, and all the variables

-0.1x+0.2=0

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

-0.1x=-0.2

x=-0.2/-0.1

x=+2

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