Question

Add a+b=0 and-a+b=4 ¿¿¿¿¿¿¿¿

Answer 1

a + b = 0

- a + b = 4

on adding

2b = 4

b = 2

substituting value of b in any equation

a = - 2

Hope it helped you

Answer 2

Answer:

I don't know answers

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