Solve for x
x=3
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2\left(x+3\right)-\left(1+x\right)=8
Multiply both sides of the equation by 8, the least common multiple of 4,8.
2x+6-\left(1+x\right)=8
Use the distributive property to multiply 2 by x+3.
2x+6-1-x=8
To find the opposite of 1+x, find the opposite of each term.
2x+5-x=8
Subtract 1 from 6 to get 5.
x+5=8
Combine 2x and -x to get x.
x=8-5
Subtract 5 from both sides.
x=3
Subtract 5 from 8 to get 3.
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Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
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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