Bullets 7405

Pavol, Igor, and Kubo played bullets. They had a total of 25 marbles. Palo had 6 more bullets than Kubo at the start. Then Igor won 8 bullets from Pavol, and thus Igor had the same number of bullets as Kubo. How many marbles does Pal have left?

Correct answer:

x =  7

Step-by-step explanation:


p+i+k = 25
p = 6+k
i+8 = k
x = p-8

i+k+p = 25
k-p = -6
i-k = -8
p-x = 8

Row 3 - Row 1 → Row 3
i+k+p = 25
k-p = -6
-2k-p = -33
p-x = 8

Pivot: Row 2 ↔ Row 3
i+k+p = 25
-2k-p = -33
k-p = -6
p-x = 8

Row 3 - 1/-2 · Row 2 → Row 3
i+k+p = 25
-2k-p = -33
-1.5p = -22.5
p-x = 8

Row 4 - 1/-1.5 · Row 3 → Row 4
i+k+p = 25
-2k-p = -33
-1.5p = -22.5
-x = -7


x = -7/-1 = 7
p = -22.5/-1.5 = 15
k = -33+p/-2 = -33+15/-2 = 9
i = 25-k-p = 25-9-15 = 1

i = 1
k = 9
p = 15
x = 7

Our linear equations calculator calculates it.

Try another example


Did you find an error or inaccuracy? Feel free to write us. Thank you!







Tips for related online calculators
Do you have a system of equations and are looking for calculator system of linear equations?

You need to know the following knowledge to solve this word math problem:

Grade of the word problem:

Related math problems and questions: