Solve for x
x=-\frac{9}{10}=-0.9
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7x+4+3x=-5
Add 3x to both sides.
10x+4=-5
Combine 7x and 3x to get 10x.
10x=-5-4
Subtract 4 from both sides.
10x=-9
Subtract 4 from -5 to get -9.
x=\frac{-9}{10}
Divide both sides by 10.
x=-\frac{9}{10}
Fraction \frac{-9}{10} can be rewritten as -\frac{9}{10} 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
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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
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