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40*4x+140x=90.000
We move all terms to the left:
40*4x+140x-(90.000)=0
We add all the numbers together, and all the variables
40*4x+140x-90=0
We add all the numbers together, and all the variables
140x+40*4x-90=0
Wy multiply elements
140x+160x-90=0
We add all the numbers together, and all the variables
300x-90=0
We move all terms containing x to the left, all other terms to the right
300x=90
x=90/300
x=3/10
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