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19/21x+15=-4
We move all terms to the left:
19/21x+15-(-4)=0
Domain of the equation: 21x!=0We add all the numbers together, and all the variables
x!=0/21
x!=0
x∈R
19/21x+19=0
We multiply all the terms by the denominator
19*21x+19=0
Wy multiply elements
399x+19=0
We move all terms containing x to the left, all other terms to the right
399x=-19
x=-19/399
x=-1/21
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