Question

5
Solve 2x - y = 2, x + 3y = 15.
2 (4.3) 3) (1.1)
4)​

Answer 1

Answer:

2x - y = 2 ----------(1)

x + 3y = 15 ---------(2)

Multiply equation (1) by 3

6x - 3y = 6 -----------(3)

x + 3y = 15 ---------(2)

--------------------------------

7x = 21

x = 21 / 7

x = 3

Substitute x = 3 in equation (1)

2(3) - y = 2

6 - y = 2

- y = 2 - 6

- y = -4

y = 4

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