Solve for x
x=-12
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3x-5-4x=7
Subtract 4x from both sides.
-x-5=7
Combine 3x and -4x to get -x.
-x=7+5
Add 5 to both sides.
-x=12
Add 7 and 5 to get 12.
x=-12
Multiply both sides by -1.
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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