Solve for a
a=\frac{45-2y}{7}
Solve for y
y=\frac{45-7a}{2}
Graph
Share
Copied to clipboard
2y=-6a+45-a
Use the distributive property to multiply -3 by 2a-15.
2y=-7a+45
Combine -6a and -a to get -7a.
-7a+45=2y
Swap sides so that all variable terms are on the left hand side.
-7a=2y-45
Subtract 45 from both sides.
\frac{-7a}{-7}=\frac{2y-45}{-7}
Divide both sides by -7.
a=\frac{2y-45}{-7}
Dividing by -7 undoes the multiplication by -7.
a=\frac{45-2y}{7}
Divide 2y-45 by -7.
2y=-6a+45-a
Use the distributive property to multiply -3 by 2a-15.
2y=-7a+45
Combine -6a and -a to get -7a.
2y=45-7a
The equation is in standard form.
\frac{2y}{2}=\frac{45-7a}{2}
Divide both sides by 2.
y=\frac{45-7a}{2}
Dividing by 2 undoes the multiplication by 2.
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}