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-15+7y=-2(-15+y)1/1
We move all terms to the left:
-15+7y-(-2(-15+y)1/1)=0
We add all the numbers together, and all the variables
7y-(-2(y-15)1/1)-15=0
We multiply all the terms by the denominator
7y*1)-(-2(y-15)1-15*1)=0
We add all the numbers together, and all the variables
7y*1)-(-2(y-15)1=0
We multiply parentheses
7y*1)-(-2y+30=0
Wy multiply elements
7y^2-2y+30=0
a = 7; b = -2; c = +30;
Δ = b2-4ac
Δ = -22-4·7·30
Δ = -836
Delta is less than zero, so there is no solution for the equation
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