Solve for a
a=-1
Share
Copied to clipboard
-4-2a-3=-\left(2-5a\right)-a+1
To find the opposite of 4+2a, find the opposite of each term.
-7-2a=-\left(2-5a\right)-a+1
Subtract 3 from -4 to get -7.
-7-2a=-2-\left(-5a\right)-a+1
To find the opposite of 2-5a, find the opposite of each term.
-7-2a=-2+5a-a+1
The opposite of -5a is 5a.
-7-2a=-1+5a-a
Add -2 and 1 to get -1.
-7-2a-5a=-1-a
Subtract 5a from both sides.
-7-7a=-1-a
Combine -2a and -5a to get -7a.
-7-7a+a=-1
Add a to both sides.
-7-6a=-1
Combine -7a and a to get -6a.
-6a=-1+7
Add 7 to both sides.
-6a=6
Add -1 and 7 to get 6.
a=\frac{6}{-6}
Divide both sides by -6.
a=-1
Divide 6 by -6 to get -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}