90422967 90422967

01-06-2021
Mathematics

contestada

4x + 8y = 20 and -4x + 2y = -30

Respuesta :

VirαtKσhli VirαtKσhli

01-06-2021

Step-by-step explanation:

Given :-

4x + 8y = 20
-4x + 2y = -30

Adding the equations :-

[tex]: \implies[/tex] 10y = -10

[tex]: \implies[/tex] y = -1

Put it (i) :-

[tex]: \implies[/tex] 4x - 8 = 20

[tex]: \implies[/tex] 4x = 20 + 8

[tex]: \implies[/tex] 4x = 28

[tex]: \implies[/tex] x = 28/4

[tex]: \implies[/tex] x = 7

Answer Link

Otras preguntas

How many whole servings of 2/3 cups are in 29/3 cups

What makes the Greek gods unique?

What group consists entirely of organic molecules

Coordinates of a triangle are (7,0) (0,8) and (20,10) what is the area of the triangle

Is anaerobic metabolism only common in elite athletes?

If shane mailed out 40% of his holiday cards, and he still has 18 cards left to mail, how many total cards did he have to mail?

How did the united states build up its armed forces?

Supplementary angles are angles whose sum is 180°. two supplementary angles are such that one angle is 3 degrees° less than less than twice twice the other. fi

How did the federal government respond to the september 11 attacks apex?

what would be a probable explation for why ther are many endemic plants and birds in new zealand but no native mamals