Question

The total number of blue marbles is 6 times that of red marbles. If the total marbles are 280, find the total number of blue and red marbles​

Answer 1

Answer:

let blue marble be 6x

then total number of red marbles is x

A . T . Q

6x+x=280

=> 7x=280

=> x=280/7=40

total numbers of red marbles = x

total numbers of blue marbles = 6x =6 × 40 = 240

Answer 2

Answer:

A bag contains blue marbles and red marbles, 62 in total. The number of blue marbles is 6 less than 3 times the number of red marbles. How many blue marbles are there?

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Mark Trencher

Answered 2 years ago

Let R = the number of red marbles.

Then I can take the information in the problem and express B, the number of blue marbles, as: B = 3R - 6.

Adding them, we have:

R + B = 62

R + 3R - 6 = 62

4R - 6 = 62

Add 6 to each side of the equation:

4R - 6 +6 = 62 + 6

4R = 68

Divide each side of the equation by 4:

R = 17 … the number of red marbles.

So B = 62 - 17 = 45

Now I’ll leave it to you to check whether R=17 and B=45 meet the condition stated in the problem.