Question

1a+3b=7 ,2a-3b=4 by eliminaton method ​

Answer 1

Step-by-step explanation:

You have to give the value of a and b

Answer 2

Answer:

1a + 3b = 7

2a - 3b = 4

(1a + 3b) + (2a - 3b) = 7 + 4

1a + 3b + 2a - 3b = 11

3a = 11

a = 11/3

Substitute:

11/3 + 3b = 7

3b = 7 - 11/3

3b = 3.333

b = 1.111

Check:

11/3 + 3(1.111)

3.66666666667 + 3.33333333333

7

Hence proved