Solve for x
x=4
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7x-5-4x=7
Subtract 4x from both sides.
3x-5=7
Combine 7x and -4x to get 3x.
3x=7+5
Add 5 to both sides.
3x=12
Add 7 and 5 to get 12.
x=\frac{12}{3}
Divide both sides by 3.
x=4
Divide 12 by 3 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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