nanazb18 nanazb18

24-10-2017
Mathematics

contestada

x+y=20 3x-3y=30 Which values of x and y satisfy this system of equations?

Relax

Respuesta :

musiclover10045 musiclover10045

24-10-2017

x +y = 20 ( rewrite as x = 20-y)

3x - 3y =30

3(20-y) - 3y = 30

60-3y - 3y = 30

60-6y = 30

-6y = -30

y = -30 / -6 = 5

x=20-5 = 15

x = 15, y = 5

Answer Link

Otras preguntas

Can’t figure out number 35 plz help This is science btw

HELPPPPP ASAPPPP PLSSSSSS

HELP Which of these events were a part of the Intolerable Acts? Check all of the boxes that apply. The port of Boston was closed. Colonists were forced to house

What is the Ka’aba? an Islamic deity a Muslim pilgrim a book of Sharia laws an ancient stone temple

answer the picture as fast as you can but make sure its accurate

In the map below, which letter represents Central America? A B C

explain strategies that can be used to ensure development?

The—————- explains why a x b = b x a and a + b = b + a

0.09 (repeating) as a fraction

Can the sum of two irrational numbers ever be a rational number? Can the quotient of two irrational numbers ever be a rational number