Which of the following operations could you perform on both sides of the given equation to solve it? check all that apply. 8x - 6 = 2x + 24

answer:

y = 7x.

step-by-step explanation:

answer:

50 + 20x

step-by-step explanation:

let's call the number of weeks after he started his saving account x. then, we starts at 50, and every week, he gains 20. because there are x weeks, the answer is 50 + 20x.

answer:

syd is 23 and dev is 69

step-by-step explanation:

let dev's age be x and syd's age be y

since dev is 3 times older than syd, we may write  

x

=

3

y

since the sum of their ages is 92, we may write  

x

+

y

=

92

now replacing x with 3y, we get :  

3

y

+

y

=

92

hence  

y

=

92

4

=

23

and so syd is 23 year old.

back substituting we get dev is 69 years old.