lacriner lacriner
  • 04-08-2022
  • Mathematics
contestada

the difference between 2 numbers, a and b is 21. the difference of 5 times a and 2 times b is 18. What are the values of a and b?

Respuesta :

jrtong jrtong
  • 04-08-2022

Answer:

Step-by-step explanation:

a-b=21

5a-2b=18

Using elimination, we have

5a-5b=105

5a-2b=18

So:

3b=-87 so b=-29

Substituting, a=-8

(a,b)=(-8,-29)

Answer Link

Otras preguntas

Please help??? Science SEMESTER REVIEW!!!!In a series of rock layers, a geologist finds fossils of a pine trees and oak trees in layers that are 1.0 m and 1.5
Why do we use granite?
Which type of twins are likely to interact with each other in the womb a. Non-identical b. Identical c. neither
I forgot what are homophones.Does anyone know what's a homophone.
How did the early voyages of discovery change european trade routes?
Nick bought a video game for $55, which was 20% off the original price. what was the original price?
Which one of the following is smallest in size ?N3-               O2-               F-                Na
What's the answer to this problem?
jessicas shoebox is 20 centimeters long and 10 centimeters wide. how many more millimeters is the length of the shoebox than the width
What is the factor of (2ab)(-5ab)