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3/4x+1/4x=90
We move all terms to the left:
3/4x+1/4x-(90)=0
Domain of the equation: 4x!=0We multiply all the terms by the denominator
x!=0/4
x!=0
x∈R
-90*4x+3+1=0
We add all the numbers together, and all the variables
-90*4x+4=0
Wy multiply elements
-360x+4=0
We move all terms containing x to the left, all other terms to the right
-360x=-4
x=-4/-360
x=1/90
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