cavanleahy
cavanleahy
19-08-2022
Mathematics
contestada
3x + y = 7
1-2x - y = 9
Respuesta :
ouff2003
ouff2003
19-08-2022
Step-by-step explanation:
3x + y = 7 ------ A
1-2x -y = 9
2x + y = -8 ------ B
A-B : x = 15 ........
so , 2(15) + y = -8
30 + y = -8
Y = -38 .......
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