Solve for y
y=-3
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-y+6+3y=0
Subtract 3 from 9 to get 6.
-y+3y=-6
Subtract 6 from both sides. Anything subtracted from zero gives its negation.
2y=-6
Combine -y and 3y to get 2y.
y=\frac{-6}{2}
Divide both sides by 2.
y=-3
Divide -6 by 2 to get -3.
Examples
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Linear equation
y = 3x + 4
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Matrix
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Simultaneous equation
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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