The sum of two sisters ages is 38. One is 10 years older than the other. How old is the oldest sister?
2 answers:
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Let the smaller number be x.
Let the bigger number be y.
Rearrange equation (2):
Sub (2) into (1):
Sub x = 1 into (2):
Answer: The two numbers are 1 and 9.
Let the bigger number be y.
Rearrange equation (2):
Sub (2) into (1):
Sub x = 1 into (2):
Answer: The two numbers are 1 and 9.