Solve for x
x=a-3
a\neq 0
Solve for a
a=x+3
x\neq -3
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a=x+3
Variable x cannot be equal to -3 since division by zero is not defined. Multiply both sides of the equation by x+3.
x+3=a
Swap sides so that all variable terms are on the left hand side.
x=a-3
Subtract 3 from both sides.
x=a-3\text{, }x\neq -3
Variable x cannot be equal to -3.
a=x+3
Multiply both sides of the equation by x+3.
Examples
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Linear equation
y = 3x + 4
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Matrix
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Simultaneous equation
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Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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