Participated 80621

Three 9th-grade classes participated in the paper collection competition. The company bought 1 kilogram of paper for €0.12, and the school received €174 thanks to their hard work. Calculate how many kg of paper 9A collected if you know that she collected twice as much as 9B, and 9C had 50 kg less than 9B.

Correct answer:

a =  750 kg

Step-by-step explanation:

p=0.12 eur/kg z=174 eur  z=p m m=z/p=174/0.12=1450 kg  a+b+c=m a=2 b c=b50 a+b+c=1450 a=2 b c=b50  a+b+c=1450 a2b=0 bc=50  Row2Row1Row2 a+b+c=1450 3bc=1450 bc=50  Row331 Row2Row3 a+b+c=1450 3bc=1450 1.333c=433.333  c=1.33333333433.33333333=325 b=31450+c=31450+325=375 a=1450bc=1450375325=750  a=750 b=375 c=325



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







Tips for related online calculators
Do you have a linear equation or system of equations and looking for its solution? Or do you have a quadratic equation?

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

Units of physical quantities:

Grade of the word problem:

Related math problems and questions: