Answer:
x = 5 ; y = - 3
Step-by-step explanation:
2x - 13 = y
2x - y =13 --------------------(i)
-3x + 2y = -21 ----------------(ii)
(i)*2 ===> 4x - 2y = 26
(ii) ===> -3x + 2y = -21
add ==> x = 5
When we are adding, -2y and 2y gives 0 or cancelled. 4x and -3x gives 1x; 26 and -21 --> different sign so subtract and put the bigger number sign. so it gives 5.
substitute x = 5 in equ (i)
2*5 - y = 13
10 - y = 13
-y = 13 -10
y = 3
y = -3
