( - \frac { 1 } { 3 } y - 7 = - 2 y
Solve for y
y = \frac{21}{5} = 4\frac{1}{5} = 4.2
Graph
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-\frac{1}{3}y-7+2y=0
Add 2y to both sides.
\frac{5}{3}y-7=0
Combine -\frac{1}{3}y and 2y to get \frac{5}{3}y.
\frac{5}{3}y=7
Add 7 to both sides. Anything plus zero gives itself.
y=7\times \frac{3}{5}
Multiply both sides by \frac{3}{5}, the reciprocal of \frac{5}{3}.
y=\frac{7\times 3}{5}
Express 7\times \frac{3}{5} as a single fraction.
y=\frac{21}{5}
Multiply 7 and 3 to get 21.
Examples
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y = 3x + 4
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Simultaneous equation
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Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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