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15x-20=-10y
Subtract 10y from both sides. Anything subtracted from zero gives its negation.
15x=-10y+20
Add 20 to both sides.
15x=20-10y
The equation is in standard form.
\frac{15x}{15}=\frac{20-10y}{15}
Divide both sides by 15.
x=\frac{20-10y}{15}
Dividing by 15 undoes the multiplication by 15.
x=\frac{4-2y}{3}
Divide -10y+20 by 15.
10y-20=-15x
Subtract 15x from both sides. Anything subtracted from zero gives its negation.
10y=-15x+20
Add 20 to both sides.
10y=20-15x
The equation is in standard form.
\frac{10y}{10}=\frac{20-15x}{10}
Divide both sides by 10.
y=\frac{20-15x}{10}
Dividing by 10 undoes the multiplication by 10.
y=-\frac{3x}{2}+2
Divide -15x+20 by 10.