Asked by Anonymous

Sipho is 4 older than his sister, their combined age is 18. How old is sipho
Answered by Reiny
sister ---- x
Sipho ---- x+4
" their combined age is 18" , what does "combined" insinuate ?
Form the resulting equation and solve for x
Answered by Ms. Sue
s + s + 4 = 18

2s = 14

s = 7 (sister's age)


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