dss354201 dss354201

04-06-2020
Mathematics

contestada

please help me. how would you change x + 3y = 18 -3x -12y = -75 to eliminate y showing all of the work

Respuesta :

KurdishPotato KurdishPotato

04-06-2020

Answer:

x = -3

y = 7

Step-by-step explanation:

x + 3y = 18

-3x - 12y = -75

multiply first equation by 4

4 × (x + 3y) = 18 ➡ 4x + 12y = 72

now add the two equations up

4x + 12y - 3x -12y = 72 - 75 (-12y will eliminate 12y)

x = -3

Answer Link

Otras preguntas

Rosle is building a wheelchair ramp that is 18 feet long and 2.5 feet high. She needs to install a vertical support plece 6 feet from the end of the ramp. What

In the book the giver. How can you relate to Jonas from the giver. PLSSS HELP ILL GIVE BRAINLIEST

help please. is due today. Thank you.

what is the measure of angle CBE?

What is the last digit of 73 factorial? pls help

Why did the Framers establish the Legislative Branch in Article I of the Constitution?

if you drink 2 grams of mg(oh)2 how many grams of hcl are neutralized

Which disease can be treated with orally administered antibiotics? a. the common cold b. otitis media c. glaucoma d. Meniere's disease

differentiate between controls independent variables and dependent variable?

What structure found in the green leaves of plants uses the sun to capture carbon (C) from carbon dioxide and water and release oxygen? A. vacuole B. nucleus C.