Solve for x
x = \frac{24}{5} = 4\frac{4}{5} = 4.8
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7x-28=2x-4
Use the distributive property to multiply 7 by x-4.
7x-28-2x=-4
Subtract 2x from both sides.
5x-28=-4
Combine 7x and -2x to get 5x.
5x=-4+28
Add 28 to both sides.
5x=24
Add -4 and 28 to get 24.
x=\frac{24}{5}
Divide both sides by 5.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
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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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}