01-11-2020
Mathematics

contestada

Solve the system of equations by the substitution method.
- x + 3y = 7
- 3x + 8y = 19

Respuesta :

delancygenius delancygenius

01-11-2020

- X = 7 -3y

=> X = 3y -7

Now substitute it in 2nd equation!

-3x+ 8y =19

=> -3 (3y- 7) + 8y =19

=> -9y +21 +8y = 19

=> -y = 19-21

=> y = 2

Now x= 3y-7

=> X = 3×2-7

=> X = 6 -7

=> X = -1

Answer Link

Otras preguntas

is the horizontal velocity always constant

simplify 10 + 4(- 8q - 4)

Why is it important for us to learn about history

Which of these is true of all irrational numbers?

A family dines in a popular franchise restaurant. They plan to use a coupon that will give them a discount of 10% off of their total dinner bill, not including

Which is located inside the lung? the larynx the pharynx the trachea the alveoli

Only need help on number 8. Thanks in advance. Must show work. If you do I will give you brainliest. :)

Which of the following was NOT a crop produced in the royal colony of Georgia

g−9=−19 What does g=???

Who are the 7 gods of good fortune? And what are the characteristics of each of them?