Sara,Aliya and Ambreen share 480 marbles.If Aliya has twice as many marbles as Sara, and Ambreen has three times as many marbles as Sara,how many marbles does Sara have?

Answer 1

just write down in math what they told you in words. If
Sara has x marbles,
Aliya has y,
Ambreen has z, then
x+y+z = 480
y = 2x
z = 3x
Now get to work. Substitute in for y and z, and you have
x + 2x + 3x = 480
6x = 480
x = 80

Answer 2

Sarah has X marbles.
Aliya has 2x marbles.
Ambreen has 3x marbles.

x + 2x + 3x = 480,
X = 80 marbles.