13-05-2016
Mathematics

contestada

How can I solve this system of linear equations by substitution 2x-3y=-24 and x+6y=18

Respuesta :

apologiabiology apologiabiology

13-05-2016

to sub
solve for 1 variable
solve for x
minus 6y both sides on second equotn

x=18-6y

sub 18-6y for x in other equation
2(18-6y)-3y=-24
36-12y-3y=-24
36-15y=-24
minus 36 oth sides
-15y=-60
divide -15 both sides
y=4

sub back

x=18-6y
x=18-4(4)
x=18-16
x=2

x=2
y=4
(2,4)

Answer Link

Otras preguntas

When it comes to safe patient handling what does it take to preform this task ergonomically

what is apples here in this next thing

Solve 5 - 2x < 7. A) x < -1 B) x > -1 C) x < -12 D) x > -12

In the 1800s, many people found Edward Clay's political cartoons offensive. However, the First Amendment gave him the right to publish his political cartoons fo

una oración con la palabra flagelar

968,000 in Scientific notation with exponents

ANSWER FAST! WILL GIVE BRAINLIST! Which of the following lines will not be shown on a typical phase diagram? A.a line that represents where liquid and solid ar

help asap help please.

A company sells two versions of an antivirus software. The home edition costs $23.50, and the business edition costs $58.75. Last week, the company earned $29,6

53% of what number is 384