Multiplying a number by 20 is equal to the sum of the number and 16

Answer 1

Hey!

Something to think about - a variable is just a letter for an unknown number! I'll use the arguably, most famous one - x. We now have:

x*20 = x+ 16.

Using "equation notation", we have... (this just turns multiplication into terms):

20x = x+ 16.

Combine like terms and solve for x! Let me know if you have questions.

Answer 2

Let's assume that the 20 numbers:

(a+b+c+... +s+t) 20 = 16.

Multiply both sides by 20.

(a+b+c+.... +s+t) = 16×20.

(a+b+c+... +s+t) = 320.

Then multiply all 20 numbers by 3.

3(a+b+c+....+s+t) 20 = 320.

3(320) 20 = mean.

960(20) = mean.

48 = mean.