shammatt2007 shammatt2007

23-01-2022
Mathematics

contestada

If 5a – 3b = 7 and b = 2a –4, what is the value of a?

Respuesta :

semsee45 semsee45

23-01-2022

Answer:

a=5, b=6

Step-by-step explanation:

Substitute b = 2a - 4 into 5a - 3b = 7:

5a - 3(2a - 4) = 7

5a - 6a + 12 = 7

a = 5

Now use the found value of a to find b by using b = 2a - 4:

b = 2(5) - 4 = 10 - 4 = 6

Answer Link

Otras preguntas

justin needs to take a taxi to the airport. it will coast $1.75 for the first mile and $0.50 for each additional 1/4 of a mile . if he is 15 miles from the airp

What are some metaphors from the book The Egypt Game?

Bacillus anthracis, the bacterium that causes the deadly disease anthrax produces thick endospores. What is the significant role of spore formation in the repro

Solve and find the integer of 4x^2-19x-5

graph the equation y – 2 = 2/3(x – 6)

each can of paint will cover 450 tiles. Augustin is painting 300 tiles in his bathroom, 675 in his kitchen, and 100 in his hallway. How many cans of paint does

Mr . Jackson sold 3 computer monitors in the 1st year. In the 2nd year, he sold 4 times as many monitors as the 1st year. In the 3rd year ,he was able to sell

Thinking About Newton's Third Law of Motion In the space provided, decribe how this concept explains the following events. 2. A squid squirts through the water

a couch ,a love seat,and a chair cost $1565.the couch costs twice as much as the chair,and the love seat costs $ 400 more than the couch. find the cost of the l

Every 5 1/2 cups of flour weighs 1 9/16 lbs. use a unit rate to show how you could determine if there are more than it less than 35 cups of flour in a 10-pound