0.45x+0.20(280-x)=69.75

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Solution for 0.45x+0.20(280-x)=69.75 equation: 



0.45x+0.20(280-x)=69.75

We move all terms to the left:

0.45x+0.20(280-x)-(69.75)=0

We add all the numbers together, and all the variables

0.45x+0.20(-1x+280)-(69.75)=0

We add all the numbers together, and all the variables

0.45x+0.20(-1x+280)-69.75=0

We multiply parentheses

0.45x-0.2x+56-69.75=0

We add all the numbers together, and all the variables

0.25x-13.75=0

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

0.25x=13.75

x=13.75/0.25

x=55

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