0.75(x)+0.90(80-x)=68.40

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Solution for 0.75(x)+0.90(80-x)=68.40 equation: 



0.75(x)+0.90(80-x)=68.40

We move all terms to the left:

0.75(x)+0.90(80-x)-(68.40)=0

We add all the numbers together, and all the variables

0.75x+0.90(-1x+80)-(68.4)=0

We add all the numbers together, and all the variables

0.75x+0.90(-1x+80)-68.4=0

We multiply parentheses

0.75x-0.9x+72-68.4=0

We add all the numbers together, and all the variables

-0.15x+3.6=0

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

-0.15x=-3.6

x=-3.6/-0.15

x=24+4.4408920985E-16/0.15

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