7. A bag of marbles has 10 red marbles, which
is twice the number of blue marbles. How
many blue marbles are there?
Answers
Answered by
0
Answer:
5
Explanation:
Answered by
1
Answer:
There are 13 blue marbles. The blue marbles are three more than twice the number of red marbles. How many red marbles are there?
Let x = the Red marbles. So 2 times the number of red marbles plus 3 equals 13 the number of Blue marbles. The equation then becomes:
2x+3=13 subtract 3 from both sides.
2x=10 Divide by 2.
x=5
The answer is 5 Red marbles.
Explanation:
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