pickerk21 pickerk21

13-12-2017
Mathematics

contestada

Substitution..... please help ((:

y=2x
x+3y=21

Respuesta :

AnimeBrainly AnimeBrainly

13-12-2017

y = 2x

x + 3y = 21

x + 3(2x) = 21

x + 6x = 21

7x = 21

7x/7 = 21/7

x = 3

2(3) = y
y = 6

hope this helps

Answer Link

Otras preguntas

Write an equation of the line passing through the points (4,10) and (-1,-15)

What character would be the best example of an archetype A. A knight who is afraid of horses B. Gwendolyn the gorgeous and intelligent girl in chemistry class

simplify the following

write a short news article on" Our cultural identity"

ANSWER QUICKLY Which example best describes reducing risky behavior?getting car insurancedeciding not to buy a caronly driving during the daydriving a car at hi

Read the excerpt again: "It is easy to recognize me. See a man in the street wearing a too long coat, too large shoes, and a crumpled hat with wide brim, specta

Can someone please tell me how to get the “ask tutor” feature in Brainly” ?

what force dose dark energy have on the universe?

help pleas, i’m fr lost

Can someone help me if an astronaut has mass 100 kilometers , what is his weight on earth where his acceleration due to gravity is 9.8m/s2