Solve for x
x=\frac{1}{3}\approx 0.333333333
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12-3x=18x+5
Use the distributive property to multiply 3 by 4-x.
12-3x-18x=5
Subtract 18x from both sides.
12-21x=5
Combine -3x and -18x to get -21x.
-21x=5-12
Subtract 12 from both sides.
-21x=-7
Subtract 12 from 5 to get -7.
x=\frac{-7}{-21}
Divide both sides by -21.
x=\frac{1}{3}
Reduce the fraction \frac{-7}{-21} to lowest terms by extracting and canceling out -7.
Examples
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y = 3x + 4
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Simultaneous equation
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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Limits
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