Solve for x
x = -\frac{7}{2} = -3\frac{1}{2} = -3.5
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7x+1-9x-3=5
To find the opposite of 9x+3, find the opposite of each term.
-2x+1-3=5
Combine 7x and -9x to get -2x.
-2x-2=5
Subtract 3 from 1 to get -2.
-2x=5+2
Add 2 to both sides.
-2x=7
Add 5 and 2 to get 7.
x=\frac{7}{-2}
Divide both sides by -2.
x=-\frac{7}{2}
Fraction \frac{7}{-2} can be rewritten as -\frac{7}{2} by extracting the negative sign.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
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y = 3x + 4
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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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