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2/5*300=x
We move all terms to the left:
2/5*300-(x)=0
We add all the numbers together, and all the variables
-1x+2/5*300=0
We multiply all the terms by the denominator
-1x*5*300+2=0
Wy multiply elements
-1500x*3+2=0
Wy multiply elements
-4500x+2=0
We move all terms containing x to the left, all other terms to the right
-4500x=-2
x=-2/-4500
x=1/2250
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