Question 665934
x = mike
y = carla
...
x = 3y
x-y = 38
...
Substitute into the second equation
3y - y = 38
2y = 38
{{{highlight(y = 19)}}} years old for Carla
...
x - {{{x/3}}} = 38
Multiply the entire equation by 3
3x - x = 114
2x = 114
{{{highlight(x = 57)}}} years old for Mike
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