Question

A box contains 144 marbles, which are either red or blue. if there are 3 times as many red marbles as there are blue marbles in the box, how many red marbles are in the box

Answer 1

Given:
X: The blue marbles.
3X: The red marbles.
A box contains 144 marbles.
SOLVING:
X + 3X = 144
4X = 144
X =
`(144)/(4)`
X = 36 ===> The blue marbles.

If there are 3 times as many red marbles as there are blue marbles:
3(36) = 108 ===> The red marbles. SOLUTION

TESTING:

`36+108=144`

`\boxed{144}=\boxed{144}\quad\checkmark\ The\ value\ is\ correct.`
GOOD LUCK...!!!