peter1104 peter1104
  • 23-12-2016
  • Mathematics
contestada

The sum of two numbers is 87. if three times the smaller number is subtracted from the larger number the result is seven. find the two numbers

Respuesta :

mathssydney
mathssydney mathssydney
  • 23-12-2016
[tex] \left \{ {{a+b=87} \atop {a-3b=7}} \right. [/tex]

a-3b=7
a=7+3b

a+b=87
(7+3b)+b=87
7+4b=87
4b=87-7
4b=80
b=20

a=7+3b
a=7+3*20
a=7+60
a=67
Answer Link

Otras preguntas

the cheetah has an ability to accelerate quickly in three seconds. suppose a cheetah could travel 15 hours at top speed covering 111.9 miles. how far can a chee
an essay on patriotic feeling for my nation in 500 words
what are some examples of primary storage, secondary storage and off-line storage used on a computer?
Round all-the-way 2,689
For this figure, find the value of x. x = _________ °
Tara is reading a book written from the point of view of a little boy. In the story, the little boy describes his experiences and all the trouble he causes. Wh
What organism's way Is its genotype is expressed
Write a sentence using nullification crisis
Lauren jogs the rate at a 2 mile every 2/5 hour. what is her until rate?
Addictive drugs produce changes in one particular group of synapses that use the neurotransmitter _______________