Solve for x
x=-5
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2x+7-5x=22
Subtract 5x from both sides.
-3x+7=22
Combine 2x and -5x to get -3x.
-3x=22-7
Subtract 7 from both sides.
-3x=15
Subtract 7 from 22 to get 15.
x=\frac{15}{-3}
Divide both sides by -3.
x=-5
Divide 15 by -3 to get -5.
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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