Solve for x
x=-4
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3\left(3x+2\right)+4\left(x+7\right)-6\left(x+1\right)=0
Multiply both sides of the equation by 12, the least common multiple of 4,3,2.
9x+6+4\left(x+7\right)-6\left(x+1\right)=0
Use the distributive property to multiply 3 by 3x+2.
9x+6+4x+28-6\left(x+1\right)=0
Use the distributive property to multiply 4 by x+7.
13x+6+28-6\left(x+1\right)=0
Combine 9x and 4x to get 13x.
13x+34-6\left(x+1\right)=0
Add 6 and 28 to get 34.
13x+34-6x-6=0
Use the distributive property to multiply -6 by x+1.
7x+34-6=0
Combine 13x and -6x to get 7x.
7x+28=0
Subtract 6 from 34 to get 28.
7x=-28
Subtract 28 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-28}{7}
Divide both sides by 7.
x=-4
Divide -28 by 7 to get -4.
Examples
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y = 3x + 4
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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}