Solve for x
x=-\frac{7y}{4}+\frac{1}{2}
Solve for y
y=\frac{2-4x}{7}
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4x+8y=y-7+9
Add 9 to both sides.
4x+8y=y+2
Add -7 and 9 to get 2.
4x=y+2-8y
Subtract 8y from both sides.
4x=-7y+2
Combine y and -8y to get -7y.
4x=2-7y
The equation is in standard form.
\frac{4x}{4}=\frac{2-7y}{4}
Divide both sides by 4.
x=\frac{2-7y}{4}
Dividing by 4 undoes the multiplication by 4.
x=-\frac{7y}{4}+\frac{1}{2}
Divide -7y+2 by 4.
4x-9+8y-y=-7
Subtract y from both sides.
4x-9+7y=-7
Combine 8y and -y to get 7y.
-9+7y=-7-4x
Subtract 4x from both sides.
7y=-7-4x+9
Add 9 to both sides.
7y=2-4x
Add -7 and 9 to get 2.
\frac{7y}{7}=\frac{2-4x}{7}
Divide both sides by 7.
y=\frac{2-4x}{7}
Dividing by 7 undoes the multiplication by 7.
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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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