5a-20+2a = 6a-11
5a+2a-6a = 20-11
1a = 9
a = 9
A quadratic equation.
That's the equation.
x = 0 and y = 4
The summary equation is the formula equation. Sugar equals alcohol plus carbon dioxide. The formula is C6H12O6 which equals 2 CH3CH2OH plus 2 CO2.
That word "equals" in there makes it an equation.
A linear equation.
It is an equation of a straight line.
There is no solution since the equation is inconsistent.
It is the general form of a quadratic equation.
4
21
It is an equation.