01-02-2017
Mathematics

contestada

ELIMINATION!! How do you work out 4x+7y= -80 and 3x+5y= -58

ELIMINATION How do you work out 4x7y 80 and 3x5y 58 class=

Respuesta :

BritishAce BritishAce

01-02-2017

Oh, I love elimination <3 Would you like to eliminate x or y?

Answer Link

apetrostone apetrostone

01-02-2017

3(4x+7y=-80)
-4(3x+5y=-58)

12x+21y=-240
-12x-20y=232
the x's cancel out and you're left with
y=8
then you plug in y and get
4x+7(8)=-80
4x+28=-80
4x=-108
x=27

Answer Link

Otras preguntas

Express sin O as a fraction in simplest form

Activity A B C D E F G H Time 5 3 7 6 7 3 10 8 a. Identify the critical path. b. How much time will be needed to complete this project

PLEASE HELP! y = 2x − 1 y = 4x - 5 solve both :)

algebra 1 solve − 0.32 + 0.18 = 0.25 − 1.95

letter to my in another school on 3 reasons why my school has been excellence in academic work

Laurel, Inc., and Hardy Corp. both have 7.3 percent coupon bonds outstanding, with semiannual interest payments, and both are currently priced at the par value

Insert the missing code in the following code fragment. This fragment is intended to implement a method to set the value stored in an instance variable. public

Find the domain in the given ordered pairs. {(2, 3), (3, 5), (6, 7), (8, 9)}

estimate the answer 210,000 divied by 0.12

Which of the following is the solution to the inequality below? 5x - 6 [tex]\leq[/tex] 14 A) x [tex]\leq[/tex] - 4/5 B) x [tex]\geq[/tex] 4 C) x [tex]\geq[/tex]