Solve for x
x=0
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\left(8\times 5+2\right)x-20x=0
Multiply both sides of the equation by 5.
\left(40+2\right)x-20x=0
Multiply 8 and 5 to get 40.
42x-20x=0
Add 40 and 2 to get 42.
22x=0
Combine 42x and -20x to get 22x.
x=0
Product of two numbers is equal to 0 if at least one of them is 0. Since 22 is not equal to 0, x must be equal to 0.
Examples
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Linear equation
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
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
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