3 years ago

2x+8y=54 x+9y=67 Solve the system by subtitution

Mathematics

1 answer:

Kisachek [45]3 years ago

3 0

Step-by-step explanation:

2x +8y = 54

x + 9y = 67

x = 67 - 9y

2(67-9y) + 8y = 54

434 - 18y + 8y = 54

434 - 10y = 54

10y = 54 - 434

10y = -380

y = -38

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