Question

Solve the simultaneous equations 6 x + y = 31 3 x + y = 16

Answer 1

Answer:

x = 5, y = 1

Step-by-step explanation:

Given:

6x + y = 31 (say, a)

3x + y = 16 (say, b)

Doing a - b we get:

(6x + y) - (3x + y) = 31 -1 6

=> 3x = 15

=> x = 5

So, from b we get that y = 16 - 3x = 16 - (3*5) = 16 - 15 = 1