3 years ago

- 5x + 2y = 9 y = 7x

Mathematics

1 answer:

Lorico [155]3 years ago

8 0

Answer:

Explanation:

- 5x + 2y = 9

y = 7x

Insert 7x For 'y'

- 5x + 2(7x) = 9

Remove Parenthesis

-5x + 2 · 7x = 9

Multiply: 2 · 7 = 14

-5x + 14x = 9

Add: -5x + 14x = 9x

9x = 9

Divide Both Sides By 9

9x ÷ 9 = 9 ÷ 9

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