Question

x + 5y = -45

-2x - 15y = 140
elimination method

Answer 1

you can either eliminate x or y in this simultaneous equation.
Let's try eliminating x.
x+5y =-45
Multiply both sides by 2
2x+10y = -90
add this equation to -2x -15y = 140
we get
-5y =50
simplify
5y = -50
y = -10
now substitute y into any equation to find x