1. A father is older than his son by 25years. 3years ago, the ratio of their ages was 3:1. Find their present ages

Let x represent the son's age

Let y represent to father's age

Two equations given

x + 25 = y

(y - 3) / 3 = (x - 3)

Sub 1st equation into the second and solve

((x+25) -3) / 3 = (x - 3)

x= 15.5 (son's age)

y= 40.5 (father's age)

step-by-step explanation:

step-by-step explanation:

i think something is missing in your question because y-1=(x-12) would not pass through the point (-4,-3). because if you replace x by -4 your are supposed to find y=-3 which is not the case her. if you replace x by -4 you find =-15.

i assume the right equation is y-1=1/4*(x-12) because this one is passing through both your points (if you are interested to know how i found that out i can tell you).

in this equation if i replace x by -4 i find y=-3 and if i replace x by 12, i find y=1 so the line representing this equation is passing through those 2 points.

then the standard form of the equation is finding an expression of y in function of x

y-1=1/4*(x-12)

y=x/4-3+1

y=x/4-2

hope that .

do you confirm there was a mistake in the question?