Solve for x -x/2+4=12

Math
-x2+4=12
Move all terms not containing x to the right side of the equation.
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Subtract 4 from both sides of the equation.
-x2=12-4
Subtract 4 from 12.
-x2=8
-x2=8
Multiply both sides of the equation by -2.
-2⋅(-x2)=-2⋅8
Simplify both sides of the equation.
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Simplify -2⋅(-x2).
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Cancel the common factor of 2.
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Move the leading negative in -x2 into the numerator.
-2⋅-x2=-2⋅8
Factor 2 out of -2.
2(-1)⋅-x2=-2⋅8
Cancel the common factor.
2⋅-1⋅-x2=-2⋅8
Rewrite the expression.
-1⋅(-x)=-2⋅8
-1⋅(-x)=-2⋅8
Multiply.
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Multiply -1 by -1.
1⋅x=-2⋅8
Multiply x by 1.
x=-2⋅8
x=-2⋅8
x=-2⋅8
Multiply -2 by 8.
x=-16
x=-16
Solve for x -x/2+4=12

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