Solve for x
x=4
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10=2\left(x+1\right)
Variable x cannot be equal to -1 since division by zero is not defined. Multiply both sides of the equation by x+1.
10=2x+2
Use the distributive property to multiply 2 by x+1.
2x+2=10
Swap sides so that all variable terms are on the left hand side.
2x=10-2
Subtract 2 from both sides.
2x=8
Subtract 2 from 10 to get 8.
x=\frac{8}{2}
Divide both sides by 2.
x=4
Divide 8 by 2 to get 4.
Examples
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\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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Limits
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