Solve for x
x=2
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37-3x-21=5x
Use the distributive property to multiply -3 by x+7.
16-3x=5x
Subtract 21 from 37 to get 16.
16-3x-5x=0
Subtract 5x from both sides.
16-8x=0
Combine -3x and -5x to get -8x.
-8x=-16
Subtract 16 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-16}{-8}
Divide both sides by -8.
x=2
Divide -16 by -8 to get 2.
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y = 3x + 4
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Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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