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15xy-15\times 6=x\times 9
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by 15x, the least common multiple of x,15.
15xy-90=x\times 9
Multiply -15 and 6 to get -90.
15xy-90-x\times 9=0
Subtract x\times 9 from both sides.
15xy-90-9x=0
Multiply -1 and 9 to get -9.
15xy-9x=90
Add 90 to both sides. Anything plus zero gives itself.
\left(15y-9\right)x=90
Combine all terms containing x.
\frac{\left(15y-9\right)x}{15y-9}=\frac{90}{15y-9}
Divide both sides by 15y-9.
x=\frac{90}{15y-9}
Dividing by 15y-9 undoes the multiplication by 15y-9.
x=\frac{30}{5y-3}
Divide 90 by 15y-9.
x=\frac{30}{5y-3}\text{, }x\neq 0
Variable x cannot be equal to 0.
15xy-15\times 6=x\times 9
Multiply both sides of the equation by 15x, the least common multiple of x,15.
15xy-90=x\times 9
Multiply -15 and 6 to get -90.
15xy=x\times 9+90
Add 90 to both sides.
15xy=9x+90
The equation is in standard form.
\frac{15xy}{15x}=\frac{9x+90}{15x}
Divide both sides by 15x.
y=\frac{9x+90}{15x}
Dividing by 15x undoes the multiplication by 15x.
y=\frac{3}{5}+\frac{6}{x}
Divide 90+9x by 15x.