21 regular sodas and 49 diet sodas. What percentage of the sodas served were regular?

30% of the sodas were regular sodas

Step-by-step explanation:

Add 21 and 49 to get the total number of sodas and 21+49=70. To get the percentage, divide 21 by 70 (21÷70) is 0.3 or 30%.

To check, do 30% (or 0.3) • 70 and you will get 21.

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0