Solve for x
x=-4
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2-2x-3=7
To find the opposite of 2x+3, find the opposite of each term.
-1-2x=7
Subtract 3 from 2 to get -1.
-2x=7+1
Add 1 to both sides.
-2x=8
Add 7 and 1 to get 8.
x=\frac{8}{-2}
Divide both sides by -2.
x=-4
Divide 8 by -2 to get -4.
Examples
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y = 3x + 4
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Matrix
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Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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