Question

solve the following simultaneous equations 1) 4x + y = 15 ; x - y = 5​ help me fast

Answer 1

x + 2y = 9 (i) and

4x - y = 15 (ii)

Multiplying (ii) by 2, we get:

8x - 2y = 30 (iii)

Adding (i) and (iii), we get:

13x = 39

x = 3

Plugging x = 3 in (ii), we get:

12 - y = 15

y = -3

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