Answer:
What is the total number
Step-by-step explanation:
If 12 = 2y, then y = 6. To solve this kind of equation, whatever you do to one side of the equation, you must do to the other, and it will remain equivalent. If you divide both sides by 2, you get 6 = y. Also, 2 * 6 = 12, a much easier way to find the answer.
Answer:
x + y = 10
Step-by-step explanation:
The mean is calculated as
mean = , thus
= 5 ( multiply both sides by 6 )
20 + x + y = 30 ( subtract 20 from both sides )
x + y = 10
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