Question

A+A+B=230
B-A=5
B=?
a)65 b)80
c)70 d)85

Answer 1

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OPTION B)

SOLUTION :-

A + A + B = 230......i)

B - A = 5 ......ii)

BY SUBSTITUTION METHOD :-

B = A + 5

Substitute B = A + 5 in equation ii)

A + A + B = 230

A + A + ( A + 5 ) = 230

3A - 5 = 230

3A = 230 - 5

A = 225 /3

A = 75

therefore,

B = A + 5

B = 75 + 5

B = 80

B = 80✅

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