vibes2018 vibes2018
  • 04-06-2019
  • Mathematics
contestada

Solve the system of equations using substitution. Show your work.

3x + 2y = 7

y = x - 4

Respuesta :

yungcee247 yungcee247
  • 04-06-2019

Answer:

x = 3

y = -1

Step-by-step explanation:

Finding X

Substitute y into the 1st equation

3x + 2(x-8) = 7

Simplify

3x + 2x-8 = 7

Combine like terms

5x - 8 = 7

Move the constant (-8) to the right

5x = 7+ 8

Simplify

5x = 15

Divide both sides by 5

x = 3

Finding Y

Now since you know x is 3 substitute that into the 2nd equation

y = 3 - 4

y = -1

Answer Link
sarakhalil31804
sarakhalil31804 sarakhalil31804
  • 04-06-2019
X=3
Y=-1 ...................
Answer Link

Otras preguntas

How would you describe the temperature of an object that has very slow moving particles?
The specific heat capacity of iron 0. 45 j/gk. Find the molar heat capacity for iron
What is a synonym for break in the verse below, “sunshine she’s here, you can take a break” A. Rest B. Fix C. Brake D. Vacation (Please help!)
5547x94 what is the answer
What can be inferred when an atom is electrically charged?
Are there any countries where men life longer than women
What is the difference between chromosomal DNA and Plasmid DNA?
The influx of which ion is directly responsible for triggering the release of acetylcholine from a motor neuron?.
Read the story description. Then choose the correct answer. The day seemed interminable as the exhausted hikers wandered across the scorching hot land. Finally
a. 23,320ftb. 5,830 ftc. 11 660 ftd. 18,000 ft​