You just need to list the factors of all 3 numbers, and see what numbers they have in common!

15: 1,3,5,15

18: 1,2,3,6,9,18

12: 1,2,3,4,6,12

so in all you can say that the common factors of 15,18,12 is: 1 and 3

3 0

3 years ago

Solve 9(8 - x) = 3x.

bulgar [2K]

Hello - let's do this step by step. Show your work.

You're asking: 9(8−x)=3x.

Now, simplify both sides of the equation.

9(8−x)=3x

(9)(8)+(9)(−x)=3x (To do that, distribute)

72+−9x=3x

−9x+72=3x

Now, subtract 3x from both sides.

−9x+72−3x=3x−3x

Simplify,

−12x+72=0

After, subtract 72 from both sides.

−12x+72−72=0−72

−12x=−72

Last thing, divide both sides by -12.

-12x/12 = -72/-12

Divide.

Therefore, you have <u>x = 6</u> as your final answer.

7 0

3 years ago