Solve for x
x = \frac{21}{2} = 10\frac{1}{2} = 10.5
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12-6x+6x+9=2x
Use the distributive property to multiply 3 by 2x+3.
12+9=2x
Combine -6x and 6x to get 0.
21=2x
Add 12 and 9 to get 21.
2x=21
Swap sides so that all variable terms are on the left hand side.
x=\frac{21}{2}
Divide both sides by 2.
Examples
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Linear equation
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Matrix
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Simultaneous equation
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Integration
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Limits
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