Question

solve each system by addition/ subtraction
5x-y=10
x-2y=18

Answer 1

Multiply first equation by (-2) and add to the second one.
You will eliminate y from the second equation and then you should be able to calculate x.
Use that value for x and write it in the first equation and calculate y.
You should get \[x=\frac{2}{9}\]
\[y=-\frac{80}{9}\]