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Answer:
Step-by-step explanation:
As the answer can be more simplified, divide both numerator and denominator by 5.
Answer:
not enough info
Step-by-step explanation:
f times x equals -3 there could be many answers like f is 1 x is -3 or f is -3 x is 1 and more
Let red marbles = X.
The probability is 1 out of 5, written as 1/5
1/5 in terms of red marbles is equal to the number of red marbles divided by 5x, where 5x is the total number of marbles.
1/5 = x/5x
Now you have 5x total marbles, x red and 4x blue.
Add 5 more red and the new probability is:
(x+5)/(5x+5) = 1/3
Simplify:
3x+15 = 5x+5
Now solve for x:
Subtract 3x from both sides:
15 = 2x +5
Subtract 5 from each side:
2x = 10
Divide both sides by 2:
x = 10/2
X = 5
There were originally 5 red marbles.
Doing (7x÷7) I think equals 1
