4. Lucy is three times as old as Alex.
Lucy is 7 years older than Megan
The sum of their ages is 126.
Find the ratio of Alex's age to Lucy's age to Megan's age.

I suggest you simplify, I promise it would make it easier

step-by-step explanation:

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dilation scale factor 2: starting with δabc, draw the dilation image of the triangle with a center at the origin and a scale factor of two. notice that every coordinate of the original triangle has been multiplied by the scale factor (x2). dilation with scale factor 2, multiply by 2.