Solve for x
x=-\frac{y}{2}+35
Solve for y
y=70-2x
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y=5x+70-7x
Use the distributive property to multiply 7 by 10-x.
y=-2x+70
Combine 5x and -7x to get -2x.
-2x+70=y
Swap sides so that all variable terms are on the left hand side.
-2x=y-70
Subtract 70 from both sides.
\frac{-2x}{-2}=\frac{y-70}{-2}
Divide both sides by -2.
x=\frac{y-70}{-2}
Dividing by -2 undoes the multiplication by -2.
x=-\frac{y}{2}+35
Divide y-70 by -2.
y=5x+70-7x
Use the distributive property to multiply 7 by 10-x.
y=-2x+70
Combine 5x and -7x to get -2x.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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Linear equation
y = 3x + 4
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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
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Limits
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