Solve for x
x = -\frac{9}{7} = -1\frac{2}{7} \approx -1.285714286
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6+3+9x=2x
Use the distributive property to multiply 3 by 1+3x.
9+9x=2x
Add 6 and 3 to get 9.
9+9x-2x=0
Subtract 2x from both sides.
9+7x=0
Combine 9x and -2x to get 7x.
7x=-9
Subtract 9 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-9}{7}
Divide both sides by 7.
x=-\frac{9}{7}
Fraction \frac{-9}{7} can be rewritten as -\frac{9}{7} by extracting the negative sign.
Examples
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Linear equation
y = 3x + 4
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Matrix
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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
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Limits
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