Solve for x
x = \frac{75}{56} = 1\frac{19}{56} \approx 1.339285714
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5\times \frac{15-x}{2}=3\times \frac{15x+2x}{2}
Multiply both sides of the equation by 45, the least common multiple of 9,15.
\frac{5\left(15-x\right)}{2}=3\times \frac{15x+2x}{2}
Express 5\times \frac{15-x}{2} as a single fraction.
\frac{5\left(15-x\right)}{2}=3\times \frac{17x}{2}
Combine 15x and 2x to get 17x.
\frac{5\left(15-x\right)}{2}=\frac{3\times 17x}{2}
Express 3\times \frac{17x}{2} as a single fraction.
\frac{75-5x}{2}=\frac{3\times 17x}{2}
Use the distributive property to multiply 5 by 15-x.
\frac{75}{2}-\frac{5}{2}x=\frac{3\times 17x}{2}
Divide each term of 75-5x by 2 to get \frac{75}{2}-\frac{5}{2}x.
\frac{75}{2}-\frac{5}{2}x=\frac{51x}{2}
Multiply 3 and 17 to get 51.
\frac{75}{2}-\frac{5}{2}x-\frac{51x}{2}=0
Subtract \frac{51x}{2} from both sides.
\frac{75+51x}{2}-\frac{5}{2}x=0
Since \frac{75}{2} and \frac{51x}{2} have the same denominator, add them by adding their numerators.
75+51x-5x=0
Multiply both sides of the equation by 2.
-5x+51x+75=0
Reorder the terms.
46x+75=0
Combine -5x and 51x to get 46x.
46x=-75
Subtract 75 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-75}{46}
Divide both sides by 46.
x=-\frac{75}{46}
Fraction \frac{-75}{46} can be rewritten as -\frac{75}{46} by extracting the negative sign.
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}