Question

find the algebraic expression? the sum of three consecutive multiples of 5 is 60.find the numbers.
[Hint: If the number is x, then 5x, 5(x+1) and 5(x+2) are the three consecutive multiples of 5.]
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Answer 1

5(x +x+1+x+2)=60

5(3x+3)=60

3x+3=60/5

3x=12-3

x=9/3

x=3

the required no. are
5x= 15
5(x+1)= 20
5(x+2)= 25

Answer 2

Answer:

Step-by-step explanation:

5x + 5(x+1) + 5(x+2) = 60 then, 5x + 5x + 5 + 5x + 10 = 60 then , 15x + 15 = 60 then, 15x = 60 - 15 then , 15x = 45 then, x = 45 / 15 so, x = 3. therefore equation becomes , 5(3) + 5(3 + 1) + 5(3 + 2) therefore, 15 + 20 + 25