h82benszw5 h82benszw5

04-07-2021
Mathematics

contestada

solve the system of equation — 3х + бу = 9
5х + 7y = -49

Respuesta :

hieu0002004 hieu0002004

04-07-2021

Answer:

y = 64/3

x = -119/3

Step-by-step explanation:

3х + 6у = 9 => 5*3x+5*6у = 9*5 => 15x+30у=45 (1)

5х + 7y = -49 => 3*5x + 3*7y = -49*3 => 15x+21y=-147 (2)

(1)-(2) => 9y = 192 => y = 64/3

x = -119/3

Answer Link

Otras preguntas

Unlike DNA, RNA contains

Cell theory teaches that

Which of the following are endpoints of the segments shown in the picture? Check all that apply. A. Point A B. Point B C. Point C D. Point D E. P

In what way are the processes of respiration and photosynthesis linked with each other? A.)The carbohydrates produced by plants in the process of photosynthesis

Which situation is considered reinforcement

What behavioural adaptation does a desert fox have to help it survive in hot places

stress can be alleviated by

what is the answer to theses 5th grade math probs<br /><br /> 1. 4.9 ÷ 7 =<br /><br /> 2. 3.6 ÷ 9 =<br /><br /> 3. 2.4 ÷

what is a popular pastime for knights

Point O is the center of the circle in the diagram. What is m∠BCA ? A80° B75° C70° D65°