Solve for y
y=3
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2\left(-2\right)=-7+y
Multiply both sides by -2.
-4=-7+y
Multiply 2 and -2 to get -4.
-7+y=-4
Swap sides so that all variable terms are on the left hand side.
y=-4+7
Add 7 to both sides.
y=3
Add -4 and 7 to get 3.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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Linear equation
y = 3x + 4
Arithmetic
699 * 533
Matrix
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Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
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