Solve for x
x=31
Graph
Quiz
Linear Equation
5 problems similar to:
\frac { 1 } { 9 } ( x + 5 ) = \frac { 1 } { 8 } ( x - 7 ) + 1
Share
Copied to clipboard
\frac{1}{9}x+\frac{1}{9}\times 5=\frac{1}{8}\left(x-7\right)+1
Use the distributive property to multiply \frac{1}{9} by x+5.
\frac{1}{9}x+\frac{5}{9}=\frac{1}{8}\left(x-7\right)+1
Multiply \frac{1}{9} and 5 to get \frac{5}{9}.
\frac{1}{9}x+\frac{5}{9}=\frac{1}{8}x+\frac{1}{8}\left(-7\right)+1
Use the distributive property to multiply \frac{1}{8} by x-7.
\frac{1}{9}x+\frac{5}{9}=\frac{1}{8}x+\frac{-7}{8}+1
Multiply \frac{1}{8} and -7 to get \frac{-7}{8}.
\frac{1}{9}x+\frac{5}{9}=\frac{1}{8}x-\frac{7}{8}+1
Fraction \frac{-7}{8} can be rewritten as -\frac{7}{8} by extracting the negative sign.
\frac{1}{9}x+\frac{5}{9}=\frac{1}{8}x-\frac{7}{8}+\frac{8}{8}
Convert 1 to fraction \frac{8}{8}.
\frac{1}{9}x+\frac{5}{9}=\frac{1}{8}x+\frac{-7+8}{8}
Since -\frac{7}{8} and \frac{8}{8} have the same denominator, add them by adding their numerators.
\frac{1}{9}x+\frac{5}{9}=\frac{1}{8}x+\frac{1}{8}
Add -7 and 8 to get 1.
\frac{1}{9}x+\frac{5}{9}-\frac{1}{8}x=\frac{1}{8}
Subtract \frac{1}{8}x from both sides.
-\frac{1}{72}x+\frac{5}{9}=\frac{1}{8}
Combine \frac{1}{9}x and -\frac{1}{8}x to get -\frac{1}{72}x.
-\frac{1}{72}x=\frac{1}{8}-\frac{5}{9}
Subtract \frac{5}{9} from both sides.
-\frac{1}{72}x=\frac{9}{72}-\frac{40}{72}
Least common multiple of 8 and 9 is 72. Convert \frac{1}{8} and \frac{5}{9} to fractions with denominator 72.
-\frac{1}{72}x=\frac{9-40}{72}
Since \frac{9}{72} and \frac{40}{72} have the same denominator, subtract them by subtracting their numerators.
-\frac{1}{72}x=-\frac{31}{72}
Subtract 40 from 9 to get -31.
x=-\frac{31}{72}\left(-72\right)
Multiply both sides by -72, the reciprocal of -\frac{1}{72}.
x=\frac{-31\left(-72\right)}{72}
Express -\frac{31}{72}\left(-72\right) as a single fraction.
x=\frac{2232}{72}
Multiply -31 and -72 to get 2232.
x=31
Divide 2232 by 72 to get 31.
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}