Question

A+B=20
A-B=30
A*7=?
anewer bataie​

Answer 1

Step-by-step explanation:

A+B = 20 —(1)

A-B = 30 —(2)

(1)+(2)

2A + B-B = 20+30

=> 2A = 50

=> A = 25

B = 20-A = 20-25 = -5

A*7 = 7×25 = 175

Answer 2

Answer:

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