Answer to Q87
A+B=36; A-B=24; A÷B=?
A + B = 36 - - (i)
A - B = 24 - - (ii)
A ÷ B = ?
From (i)
B = 36 - A - - (iii)
Putting (iii) into (ii)
A - (36 - A) = 24
A - 36 + A = 24
2A = 24 + 36
2A = 60
A = 30
Putting A into (iii)
B = 36 - 30
B = 6
So, A ÷ B = 30 ÷ 6 = 5
Answer: 5
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