Solve for x
x=\frac{2}{7}\approx 0.285714286
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\frac{3}{7}\times 3=x+1
Multiply both sides by 3.
\frac{3\times 3}{7}=x+1
Express \frac{3}{7}\times 3 as a single fraction.
\frac{9}{7}=x+1
Multiply 3 and 3 to get 9.
x+1=\frac{9}{7}
Swap sides so that all variable terms are on the left hand side.
x=\frac{9}{7}-1
Subtract 1 from both sides.
x=\frac{9}{7}-\frac{7}{7}
Convert 1 to fraction \frac{7}{7}.
x=\frac{9-7}{7}
Since \frac{9}{7} and \frac{7}{7} have the same denominator, subtract them by subtracting their numerators.
x=\frac{2}{7}
Subtract 7 from 9 to get 2.
Examples
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{ 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}