Question

Ec. 1. 8x - y = -20
Ec. 2. 2x + 3y = 8



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Answer 1

3(8x-y= -20)
1(2x+3y= 8)

24x-3y= -60
2x+3y= 8
———————
26x = -52
x= -52/26
x= -2

Sustituimos x para obtener y en:

2x+3y = 8
2(-2)+3y = 8
-4+3y = 8
3y = 8+4
y= 12/3
y= 4