SOLUTION: Bill and Mark have a combined mass of 85kg. Marks mass is 20kg less than twice Bills mass. What is each boys mass. Write equation. Write bills mass. Write marks mass
Algebra.Com
Question 786564: Bill and Mark have a combined mass of 85kg. Marks mass is 20kg less than twice Bills mass. What is each boys mass. Write equation. Write bills mass. Write marks mass
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
(1)
(2)
Substitute (2) into (1)
(1)
(1)
(1)
(1)
and, since
(2)
(2)
(2)
Bill weighs 52.5 kg
Mark weighs 32.5 kg
------------------
check:
(1)
(1)
(1)
OK
RELATED QUESTIONS
The combined mass of two trucks is 29 tonnes. The heavier truck is 1 tonne less than... (answered by jorel555)
Hi
the average mass of 3 bags A B C when they are full is 38kg. When all the items... (answered by Fombitz)
Object A is 5kg heavier than the Object B and the mass of Object C is twice the mass of... (answered by Theo,josgarithmetic)
The mass of the great pyramid is 557t greater than that of the leaning tower of pisa.... (answered by wuwei96815)
5 lollipops and 12 toffees have a mass of 61 grams
10 lollipops and 13 toffees have a... (answered by Boreal)
The mean mass of game fish in a certain locale is determined to be 2.5 kg and the... (answered by Edwin McCravy)
A basket with 42 watermelon has a mass of 81950 gms. The same basket with 31 watermelon... (answered by fractalier)
A basket with 12 apples has a mass of 3,105 grams. The same basket with 7 apples has a... (answered by ikleyn)
The mass of a species of mouse commonly found in houses is normally distributed with a... (answered by ewatrrr)