Answered

if 20 is added to1/3 a number, the result is twice the number. what is the number?

Sagot :

HermioneGrxngerviz

Answer:

x = 12

Step-by-step explanation:

20 + 1/3x = 2x

Transpose 2x and 20 then change their sign

1/3x - 2x = -20

Combine like terms

-5/3x = -20

Mutiply both sides by -5/3

(3/-5)-5/3x = -20(-3/-5)

x = 12

Checking:

20 + 1/3x = 2x

20 + 1/3(12) = 2(12)

20 + 12/3 = 24

20 + 4 = 24

24 = 24

TRUE