Question

2a+5b=13, 3a-2b=10 what is the answer

Answer 1

Answer:

a=4, b=1

Step-by-step explanation:

Given,

2a+5b = 13 (i)

3a-2b = 10 (ii)

Now,

(i)x3 - (ii)x2

3(2a+5b) - 2(3a-2b) = 3x13-2x10

6a+15b-6a+4b = 39-20

19b = 19

b = 1

putting value in (i)

2a+5(1) = 13

2a+5 = 13

2a = 8

a = 4