A brother is 3 years older than his sister. Five years ago, the ratio of their ages was 4 : 3. Find the boy age.
1 answer:
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The graph of
... y = 3/4 - 2
is a horizontal line at y = -1.25.
The graph of
... y = (3/4)x - 2
is an upward-sloping line with a rise of 3 for every 4 units to the right. It intercepts the y-axis at y = -2.
