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

What are 2 numbers that when multiplied together you get 360 and when added together you get -96

what is the cubic root of - 250

Factor completely, the expression: 2x^3-2x^2-12x

What are 2 numbers that when multiplied together you get 360 and when added together you get -96

Genetic crosses Question:A brown coat is dominant to a white coat in cattle. A farmer has a brown bull. How would you determine whether the bull is a heteroz

what does the agora tell us about the culture of athens?

What are good book to read from war times about family / adoption / giving up of children

What is the solution to this system of linear equations: y-x=4 and y+2x=1 1) (-1,3) 2) (0,4) 3) (1,-1) 4) (-3,3)

List two factors that might cause an organism to restrict its use of a resource.

how do I solve this proportion?