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(0.4x)+x=1440
We move all terms to the left:
(0.4x)+x-(1440)=0
We add all the numbers together, and all the variables
(+0.4x)+x-1440=0
We add all the numbers together, and all the variables
x+(+0.4x)-1440=0
We get rid of parentheses
x+0.4x-1440=0
We add all the numbers together, and all the variables
1.4x-1440=0
We move all terms containing x to the left, all other terms to the right
1.4x=1440
x=1440/1.4
x=1028+0.80000000000018/1.4
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