Solve for x
x=-1
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\frac{5}{2}x+9-x=\frac{15}{2}
Subtract x from both sides.
\frac{3}{2}x+9=\frac{15}{2}
Combine \frac{5}{2}x and -x to get \frac{3}{2}x.
\frac{3}{2}x=\frac{15}{2}-9
Subtract 9 from both sides.
\frac{3}{2}x=\frac{15}{2}-\frac{18}{2}
Convert 9 to fraction \frac{18}{2}.
\frac{3}{2}x=\frac{15-18}{2}
Since \frac{15}{2} and \frac{18}{2} have the same denominator, subtract them by subtracting their numerators.
\frac{3}{2}x=-\frac{3}{2}
Subtract 18 from 15 to get -3.
x=-\frac{3}{2}\times \frac{2}{3}
Multiply both sides by \frac{2}{3}, the reciprocal of \frac{3}{2}.
x=\frac{-3\times 2}{2\times 3}
Multiply -\frac{3}{2} times \frac{2}{3} by multiplying numerator times numerator and denominator times denominator.
x=\frac{-3}{3}
Cancel out 2 in both numerator and denominator.
x=-1
Divide -3 by 3 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}