Write an equation for each of these and solve it to find the value of the unknown number:

a) i think of a number, i multiply it by 5 then add 5. the answer is 20

b) i think of a number, i divide it by 5 then subtract 5. the answer is 4

a) a *5+5= 20

5a + 5 = 20

5a = 20 - 5

5a = 15

a = 15/5

a = 3

b) b/5 - 5 = 4

b/5 = 4 + 5

b/5 = 9

b =9*5

b = 45

no one knows lol

step-by-step explanation:

hello i am doing good for you that it's summer in your country or state ; )

btw in my country we just have sun and rain as (because i live in the caribbean lol)

also, thx a lot for the points : )