# Algebra

Sipho is 4 older than his sister, their combined age is 18. How old is sipho

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1. sister ---- x
Sipho ---- x+4
" their combined age is 18" , what does "combined" insinuate ?
Form the resulting equation and solve for x

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2. s + s + 4 = 18

2s = 14

s = 7 (sister's age)

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Ms. Sue

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