Solve for x
x=7
Graph
Share
Copied to clipboard
7\times 2x+5\times 3x+x=210
Multiply both sides of the equation by 35, the least common multiple of 5,7,35.
14x+5\times 3x+x=210
Multiply 7 and 2 to get 14.
14x+15x+x=210
Multiply 5 and 3 to get 15.
29x+x=210
Combine 14x and 15x to get 29x.
30x=210
Combine 29x and x to get 30x.
x=\frac{210}{30}
Divide both sides by 30.
x=7
Divide 210 by 30 to get 7.
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}