Kamal is 17 years older than Gina. Gina is 3 years younger than Rachelle. If the sum of their ages..

[woven reef]

let kamal be age x, gina be y, rachelle be z

you get y + 17 = x

y + 3 = z

x + y + z = 77

you have x and z in terms of y,so you can substitue in the last equation and solve for y

[finite flax]

Okay I will try that method

[uncut sundial]

After you find y, ig you plug in again for x and z

I think u ALR know this tho lol

[sullen carbon]

not gonna lie its way easier if you just imagine gina is x and if kamal is 17 years olders than gina then kamal is x + 17 and rachelle is 3 years older than gina so rachelle is x + 3 then you just sum it all up and its 77 and you need to solve for x only. thats the easiest way

3x + 20 = 77
3x = 57
x = 19

[woven reef]

honestly, i have trouble doing these cause im more used to multi variable stuff mb

[brittle yew]

That is literally the same thing as copter said lol

Copter just hadn’t yet done the step of substituting the top 2 equations into the bottom one

[sullen carbon]

well yeah but its just practically an extra step without needing to do that

[desert pebble]

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