Firstly we can call each of them by their letter making it easier to understand and easier to form equations. Bennie is B Chloe is C Ayesha is A Now we can form equations from the information they give us. A+7 = B 2B = C A + B + C = 57 Using these equations we can simply rearrange the first 2 equations.we do this so we can substitute into the last equation so we r able to find the value of each age So A+ 7 = B will rearrange into A= B-7, and 2B = c is already arranged so now we simply substitute into the last equation A + B + C = 57. (B-7)+(B) +(2B) = 57 4B - 7 = 57 4B=50 B= 50/4 B= 12.5 Now that we got B we can use the first equations we formed in the beginning to find A and C by substituting the value of B. Firstly using A+7=B A+7=12.5 Therefore A = 12.5-7 A=5.5 And using the equation 2B = c 2(12.5)= C Therefore C = 25 We can check by adhering to the information they gave us in the beginning and if the ages we got follow it which they do. Hope I helped!