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

graph the system of inequalities y> 2x-3 and 3y-x≤6

what phrase best defines dialect 1. the set of slang terms in a language 2.a manner of conversation that contains no idioms 3. rules relating spelling and pronu

What is an old Chinese belief concerned with tadpoles?

The width,w, of a rectangular garden is X -2 the area of the garden is X^3-2X-4 what is an expression for the length of the garden? A. X^2-2x-2 B. X^2+2x-2 C.

Trying to figure out how many 15pt into cups?

At a local fitness center, members pay an $8 membership fee and $4 for each aerobic class. Nonmembers pay $6 for each aerobic class. For what number of aerobics

which 1828 national party favored states rights?

What is the difference between the Medicare and Medicaid programs?

Find the angle with a tangent ratio of 0.4877

What must occur when an electron in an atom returns from a higher energy state to a lower energy state?(1) A specific amount of energy is released (2) A random