Solve for x
x=-\frac{y}{7}-1
Solve for y
y=-7x-7
Graph
Share
Copied to clipboard
8x+7=2x-x-y
Combine 9x and -x to get 8x.
8x+7=x-y
Combine 2x and -x to get x.
8x+7-x=-y
Subtract x from both sides.
7x+7=-y
Combine 8x and -x to get 7x.
7x=-y-7
Subtract 7 from both sides.
\frac{7x}{7}=\frac{-y-7}{7}
Divide both sides by 7.
x=\frac{-y-7}{7}
Dividing by 7 undoes the multiplication by 7.
x=-\frac{y}{7}-1
Divide -y-7 by 7.
8x+7=2x-x-y
Combine 9x and -x to get 8x.
8x+7=x-y
Combine 2x and -x to get x.
x-y=8x+7
Swap sides so that all variable terms are on the left hand side.
-y=8x+7-x
Subtract x from both sides.
-y=7x+7
Combine 8x and -x to get 7x.
\frac{-y}{-1}=\frac{7x+7}{-1}
Divide both sides by -1.
y=\frac{7x+7}{-1}
Dividing by -1 undoes the multiplication by -1.
y=-7x-7
Divide 7+7x by -1.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
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
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}