Solve for x
x = -\frac{9}{8} = -1\frac{1}{8} = -1.125
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4x-7-8x-2=4x
Use the distributive property to multiply -2 by 4x+1.
-4x-7-2=4x
Combine 4x and -8x to get -4x.
-4x-9=4x
Subtract 2 from -7 to get -9.
-4x-9-4x=0
Subtract 4x from both sides.
-8x-9=0
Combine -4x and -4x to get -8x.
-8x=9
Add 9 to both sides. Anything plus zero gives itself.
x=\frac{9}{-8}
Divide both sides by -8.
x=-\frac{9}{8}
Fraction \frac{9}{-8} can be rewritten as -\frac{9}{8} by extracting the negative sign.
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}