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25x/5+4.2x=-7x+40/2
We move all terms to the left:
25x/5+4.2x-(-7x+40/2)=0
We add all the numbers together, and all the variables
25x/5+4.2x-(-7x+20)=0
We add all the numbers together, and all the variables
4.2x+25x/5-(-7x+20)=0
We get rid of parentheses
4.2x+25x/5+7x-20=0
We multiply all the terms by the denominator
(4.2x)*5+25x+7x*5-20*5=0
We add all the numbers together, and all the variables
(+4.2x)*5+25x+7x*5-20*5=0
We add all the numbers together, and all the variables
25x+(+4.2x)*5+7x*5-100=0
We multiply parentheses
25x+20x+7x*5-100=0
Wy multiply elements
25x+20x+35x-100=0
We add all the numbers together, and all the variables
80x-100=0
We move all terms containing x to the left, all other terms to the right
80x=100
x=100/80
x=1+1/4
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