Question

2a + 2b=7 4a +3b = 12

Answer 1

Answer:

a = 3/2, b = 2.

Step-by-step explanation:

2a + 2b = 7

4a + 3b = 12

If we multiply the first equation by 2 we get

4a + 4b = 14

Subtracting this from second equation:

-b = -2

b = 2.

Substitute b = 2  in the first equation

2a + 2(2) = 7

2a = 3

a = 3/2.

Answer 2

Answer:      1. a = 7 /2 − b                         2.a = 3 − 3 b 4

Step-by-step explanation: