sam7999 sam7999

18-02-2020
Mathematics

contestada

What is the solution of 3x + y = 9 and 3x - 5y = 15

Respuesta :

amna04352 amna04352

18-02-2020

Answer:

x = 10/3, y = -1

Step-by-step explanation:

3x+y = 9 (1)

3x-5y = 15 (2)

(1) - (2) [subtract (2) from (1)]

6y = -6

y = -1

Using (1),

3x + (-1) = 9

3x = 10

x = 10/3

Answer Link

Otras preguntas

Name Two Major Branch Of Geography!

Write the algebraic expression? The quotient of 207 and a number n

Solving Multi-Step Equations14. 4(2a+2)-17= 1516. -4x+3(2x-5)= 3117. -6-3(2k+4)= 1822. 2x+ 3/4(4x+16=7

How to rename the number 24 ten thousands?

In what ways did the Nixon-era court continue to uphold reform efforts? In what ways was it more conservative than the Warren Court had been?

Find the rate and unit rate for 40 meters in 16 seconds

"The cover of a photo album has an area of 97.5 square inches. Find it's area in square centimeters.

How would you write 2.11 as a mixed number in simplest form

What is the rate and unit rate for 420 miles in 7 hours

How would using a number line to find the sum 2+5 be different from using a number line to find the sum -2+(-5)?