How do you solve the system of equations #2x+8y=6# and #-5x-20y=-15#?
This system of equation doesn't have any solutions.
Let's simplify these equations: divide the first one by
Now, using any of the equations, we must express one variable by the other, let's say
Using this we solve the other equation:
The y- values will depend on the x chosen.
There are different options available to solve the equations.
To be able to use substitution, a single variable in one of the equations is a useful indicator
Make x the subject of the equation: