Solve for x
x=\frac{y+28}{7}
Solve for y
y=7\left(x-4\right)
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7x-28=y
Use the distributive property to multiply 7 by x-4.
7x=y+28
Add 28 to both sides.
\frac{7x}{7}=\frac{y+28}{7}
Divide both sides by 7.
x=\frac{y+28}{7}
Dividing by 7 undoes the multiplication by 7.
x=\frac{y}{7}+4
Divide y+28 by 7.
7x-28=y
Use the distributive property to multiply 7 by x-4.
y=7x-28
Swap sides so that all variable terms are on the left hand side.
Examples
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Matrix
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Simultaneous equation
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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Limits
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