Answers

2014-02-25T22:47:57+08:00
Let tim's age be the variable x
Let lando's age be the variable y

Therefore,
x+y= 28 (Equation 1)
y= x+5 (Equation 2)

Substitute

x+y= 28
x+x+5= 28
2x+5=28
2x=23
x= 11 1/2

substitute

x+y=28
11 1/2 + y = 28
y=16 1/2

THEREFORE:
Tim: 11 1/2 yrs old
Lando: 16 1/2 yrs old
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