Question

Solve the system of equations -x-2y=0 and -x+y=6 by combining the equations

Answer 1

x=-4 and y=10

Explanation:

Use the second equation to make y=x+6

sub y=x+6 into the first equation

-x-2*(x+6)=0

-x-2x-12=0

-3x-12=0

3x=-12

x=-4

Now sub x=-4 into the second equation

-(-4)+y=6

y=6+4

y=10