sophiazjackson sophiazjackson
  • 03-10-2021
  • Mathematics
contestada

what is the value of x in the solution to this system of equations?
4x + 7y = 85
x = 2y - 5

A) 11
B) 24
C) 6
D) 9​

Respuesta :

seetha1980
seetha1980 seetha1980
  • 03-10-2021

Answer:

D) x=9

Step-by-step explanation:

x = 2y- 5

2y = x + 5

y = (x+5) / 2

4x + 7(x+5)/2 = 85

8x + 7x + 35 = 85*2

15x + 35 = 170

15x = 170 - 35 = 135

x = 135/15 = 9

Answer Link

Otras preguntas

hilary can read 560 words in 7 minutes how many words can hilary read in 1 minute
what is 3/8 in simplest form
Which of the following is the best definition of polis? A. a city within a state B. a small state run by citizens C. a Greek island state D. a large area govern
To expand his empire, Tang Taizong primarily relied on his military skills. used his trade relationships. chose loyal friends as officials. won over the peasant
Solve the inequality and show work: -5(t+4) ≥ 3(t-4)
.7n-1.5+7.3n=14.5 what is the answer to this quetion
to imagine the visual form of an object or situation that one cannot see
The 'divide and rule' policy employed by the English was developed by the _____.
How do you use the guess and check method to solve mathematical sentences
tienes un Gato o un perro