Question

. Solve the following pair of equations : 2x + y = 7 and 3x + 2y = 12

Answer 1

Answer:

Step-by-step explanation:

2x + y = 7

y = 7 - 2x

Using y = 7 - 2x here,

3x + 2(7-2x) = 12

3x + 14 - 4x = 12

- 1 x = 12 - 14

- 1x = -2

 x = 2

Using x = 2,

y = 7 - 2x

y = 7 - (2x2)

y = 7 - 4

y = 3