Question

Solve the equation a + 2b = -1 and 2a - 3b = 12
a = 3, b = 3
a = 3, b = 4
a = 3, b = -2
a = -2, b = 3​

Answer 1

Answer:

a = 3, b = -2

Step-by-step explanation:

a + 2b = -1 (equation 1)

2a - 3b = 12 (equation 2)

solving simultaneously,

(a+2b = -1)×3

(2a-3b = 12)×2

3a + 6b = -3

4a - 6b = 24

7a = 21 (+6b - 6b gets cancelled)

=>a=3

on putting value, we get,

3 + 2b= -1

2b= -4

b= -2