Solve for x
x=-4
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0=-78+6x-9x+42-6x
Subtract 33 from -45 to get -78.
0=-78-3x+42-6x
Combine 6x and -9x to get -3x.
0=-36-3x-6x
Add -78 and 42 to get -36.
0=-36-9x
Combine -3x and -6x to get -9x.
-36-9x=0
Swap sides so that all variable terms are on the left hand side.
-9x=36
Add 36 to both sides. Anything plus zero gives itself.
x=\frac{36}{-9}
Divide both sides by -9.
x=-4
Divide 36 by -9 to get -4.
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Matrix
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Simultaneous equation
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Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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