Jrjoeao Jrjoeao
  • 12-12-2020
  • Mathematics
contestada

-7x-2y= -13
x-2y= 11

Solve the question with substitution and show work

Respuesta :

hunterkinglol5
hunterkinglol5 hunterkinglol5
  • 12-12-2020

Answer:

x=3,y= -4

Step-by-step explanation:

ii) x-2y=11

x=11+2y-----(i)

Now,

i) -7x-2y= -13

or, -7(11+2y)-2y= -13

or, -77-14y-2y = -13

or -14y-2y = -13+77

or -16y = 64

or y =64÷(-16)

:: y = -4

Again,

(ii) x-2y= 11

or x-2(-4)= 11

or x+8 = 11

or x = 11-8

:: x = 3

Answer Link

Otras preguntas

How to find greatest common factor  45 and 81
How to find greatest common factor  45 and 81
how do i round to the nearest whole number:examples:  25.6, 327.9, 58.2, othersand fractions like this: 109 3/4 if i can round to the nearst  whole number teel
The message of the DNA Code is information for building_______.
what is 0.3 x0.6 this is new to me
116% as a fraction or mixed number
In the sentence   The football players train for the big game.    what part of speech is train                            The train sped over the tracks.
8x+15=3x-20 how do you do this
How to find greatest common factor  45 and 81
95 is 95% of what number?