Solve for y
y=4
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y=\left(-y\right)\times 1+8
Calculate -1 to the power of 2 and get 1.
y-\left(-y\right)\times 1=8
Subtract \left(-y\right)\times 1 from both sides.
y-\left(-y\right)=8
Reorder the terms.
y+y=8
Multiply -1 and -1 to get 1.
2y=8
Combine y and y to get 2y.
y=\frac{8}{2}
Divide both sides by 2.
y=4
Divide 8 by 2 to get 4.
Examples
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\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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Limits
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