Nine years ago, a woman was three times as old as her son. In eight years from now, the sum of
their ages will be 78. How old are they today?

she would would be about 61 years and her son about 20 years

Step-by-step explanation:

78-9=69

70-8=61

61/3=20.3

y-y1=4(x-x1)

step-by-step explanation:

this is point-slope form since you only have 4 as the slope it goes in place of m

hope this : )