Solve for x
x=56
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8\left(7-x\right)=-7x
Multiply both sides of the equation by 7.
56-8x=-7x
Use the distributive property to multiply 8 by 7-x.
56-8x+7x=0
Add 7x to both sides.
56-x=0
Combine -8x and 7x to get -x.
-x=-56
Subtract 56 from both sides. Anything subtracted from zero gives its negation.
x=56
Multiply both sides by -1.
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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
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