Question

dada a equçao 6x=y=42 a x=8 x=30

Answer 1

Resposta:

6x-y=42 dados: X=8; y=30

6×8-y=42

48-y=42

-y=42-48

-y=-6 (×1)

y=6

6x-y=42

6x-30=42

6x=42+30

6x=72

X=72/6

X=12