SOLUTION: David has two brothers. One brother is two years younger than him and the other is five years older than him.
a) Let david be x years old. Write down an expression for the sum o
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a) Let david be x years old. Write down an expression for the sum o
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Question 841622: David has two brothers. One brother is two years younger than him and the other is five years older than him.
a) Let david be x years old. Write down an expression for the sum of their ages.
b) The sum of their ages is 39. Write down an equation and solve it to find x
c) What are their ages? Answer by ewatrrr(24785) (Show Source):
Hi,
David has two brothers. One brother is two years younger than him
and the other is five years older than him.
a) Let david be x years old. Sum of their ages: x + (x-2) + (x+5)
b) x + (x-2) + (x+5) = 39
3x +3 = 39
3x = 36
x = 12
c) What are their ages? David is 12. Brothers are 10 and 17
