Solve for x
x=4
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x+8=3x
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by x.
x+8-3x=0
Subtract 3x from both sides.
-2x+8=0
Combine x and -3x to get -2x.
-2x=-8
Subtract 8 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-8}{-2}
Divide both sides by -2.
x=4
Divide -8 by -2 to get 4.
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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Limits
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