Asked by kiran
the sum of the age of a girl and her brother is 26 year 3 years ago her age was 4 time the age of her brother. find their present age?
Answers
Answered by
Bosnian
g = girls age
b = boys age
g + b = 26 Subtract b to both sides
g + b - b = 26 - b
g = 26 - b
g - 3 = 4 ( b - 3 )
26 - b - 3 = 4 ( b - 3 )
23 - b = 4 b - 12 Add b to both sides
23 - b + b = 4 b + b - 12
23 = 5 b - 12 Add 12 to both sides
23 + 12 = 5 b - 12 + 12
35 = 5 b Divide both sides by 5
35 / 5 = 5 b / 5
7 = b
b = 7
g = 26 - b
g = 26 - 7
g = 19
b = boys age
g + b = 26 Subtract b to both sides
g + b - b = 26 - b
g = 26 - b
g - 3 = 4 ( b - 3 )
26 - b - 3 = 4 ( b - 3 )
23 - b = 4 b - 12 Add b to both sides
23 - b + b = 4 b + b - 12
23 = 5 b - 12 Add 12 to both sides
23 + 12 = 5 b - 12 + 12
35 = 5 b Divide both sides by 5
35 / 5 = 5 b / 5
7 = b
b = 7
g = 26 - b
g = 26 - 7
g = 19
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