Question

For what purpose are they used

Answer 1

Explanation:

a + b = 5 a - b = 3

a= 3 + b

3 + b + b = 5

3 + 2b = 5

2b = 2

b = 1

then a = 3 + b

a = 3 + 1

a = 4

therefore a = 4 and b = 1

Answer 2

Answer : bro plz ask question which are complete