owenhayes11p3eiyp
owenhayes11p3eiyp
30-04-2018
Mathematics
contestada
i need help super bad!!!!
Respuesta :
mkryukova19
mkryukova19
30-04-2018
4x+7y=47 /*4 ------>16x + 28y=188
5x-4y=-5 /*7 -------->35x-28y=-35
16x + 28y=188, add this two equations
35x-28y=-35
16x + 28y+35x-28y=188-35
16x +35x=188-35
51x =153m
x=3
5x-4y=-5
5*3-4y=-5
15-4y=-5
4y=15+5
4y=20
y=5
Answer (3,5), B
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