Solve for x
x=-5
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-x-3=2\left(6+x\right)
To find the opposite of x+3, find the opposite of each term.
-x-3=12+2x
Use the distributive property to multiply 2 by 6+x.
-x-3-2x=12
Subtract 2x from both sides.
-3x-3=12
Combine -x and -2x to get -3x.
-3x=12+3
Add 3 to both sides.
-3x=15
Add 12 and 3 to get 15.
x=\frac{15}{-3}
Divide both sides by -3.
x=-5
Divide 15 by -3 to get -5.
Examples
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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Limits
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