hudson9020 hudson9020
  • 03-01-2018
  • Mathematics
contestada

4a + 6b = 10 2a - 4b equals 12 what does 12a equal

Respuesta :

anchitthawi
anchitthawi anchitthawi
  • 04-01-2018
4a+6b=10 ----(1)
2a-4b=12 ----(2)
(2)*2; 4a-8b=24----(3)
(1)-(3); 6b-(-8b) = 10-24
14b = -14
so b = -1
then 2a-4(-1)=12
2a+4=12
2a = 8
so a = 4
then 12a = 12*4 = 48 #
Answer Link

Otras preguntas

The value of x is???
Which of these should be avoided in order to prevent heart diseases and disorders?
Can somebody help me please
Lin's father is paying for a $20 dollar meal. He has a 15% coupon for the meal. After the discount, a 7% sales tax is applied. -What does lin's father pay for t
find the surface area of a rectangular prism having dimensions 3 feet x 4 feet x 5 feet?
what was the missouri compromise of 1820, and what issue did it reveal in american politics
Put the European explorers and their journeys and conquests in the order in which they happened NEED HELP ASAP!!!
3. Use the diagram below to answer the following questions. a. Name three points. b. Name four different line segments. c. Write two other names for (FG) ⃡.
Based on the passage, what can you infer about President Jackson’s feelings about removing the Cherokee from their land? A. He thought it should happen, even i
Where did the unification of Germany take place?