If x + y = 7 and 2x - y = 2, then y = ?

Solution:

Given, equations are x + y = 7

x = 7 - y --- (1)

2x - y = 2 --- (2)

We have to find the value of y.

Substitute (1) in (2),

⇒ 2(7 - y) - y = 2

⇒ 14 - 2y - y = 2

⇒ 14 - 3y = 2

⇒ 3y = 14 - 2

⇒ 3y = 12

⇒ y = 12/3

⇒ y = 4

Therefore, the value of y is 4.

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If x + y = 7 and 2x - y = 2, then y = ?

Summary:

If x + y = 7 and 2x - y = 2, then y = 4.