Solve for x
x=2y-5
Solve for y
y=\frac{x+5}{2}
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y-2=\frac{1}{2}x+\frac{1}{2}
Use the distributive property to multiply \frac{1}{2} by x+1.
\frac{1}{2}x+\frac{1}{2}=y-2
Swap sides so that all variable terms are on the left hand side.
\frac{1}{2}x=y-2-\frac{1}{2}
Subtract \frac{1}{2} from both sides.
\frac{1}{2}x=y-\frac{5}{2}
Subtract \frac{1}{2} from -2 to get -\frac{5}{2}.
\frac{\frac{1}{2}x}{\frac{1}{2}}=\frac{y-\frac{5}{2}}{\frac{1}{2}}
Multiply both sides by 2.
x=\frac{y-\frac{5}{2}}{\frac{1}{2}}
Dividing by \frac{1}{2} undoes the multiplication by \frac{1}{2}.
x=2y-5
Divide y-\frac{5}{2} by \frac{1}{2} by multiplying y-\frac{5}{2} by the reciprocal of \frac{1}{2}.
y-2=\frac{1}{2}x+\frac{1}{2}
Use the distributive property to multiply \frac{1}{2} by x+1.
y=\frac{1}{2}x+\frac{1}{2}+2
Add 2 to both sides.
y=\frac{1}{2}x+\frac{5}{2}
Add \frac{1}{2} and 2 to get \frac{5}{2}.
Examples
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y = 3x + 4
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\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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