Question

solve this question on page​

Answer 1

Step-by-step explanation:

A+B-C= 30

B+C-A=45

add both of them

2B=75

B= 37(1/2)

A+B+C= 180

A+B-C=30

2C= 150

C= 75

SO A= 180-75-37(1/2)

A= 67(1/2)