#
Solve x+y=8 and 2x-y=1 by

substitutional method

## Answers

Answered by

1

**Step-by-step explanation:**

- x + y = 8 → ①
- 2x - y = 1 → ②

,

- x + y = 8
- x = 8 - y → Eqn 1

Now ,

- 2x - y = 1
- 2 ( 8 - y ) - y = 1
- 16 - 2y - y = 1
- 16 - 3y = 1
- - 3y = 1 - 16
- - 3y = - 15

Cancel on both sides

- 3y = 15
- y =
- y = 5

- x = 8 - y
- x = 8 - 5
- x = 3

*:**.** *x = 3 and y = 5

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