Which equation shows the substitution method being used to solve the system of linear equations?

x + y = 6
x = y + 5

A.
x = (x – 6) + 5

B.
(y + 5) + y = 6

C.
x + (y + 5) = 6

D.
x + y = y + 5

Question

Which equation shows the substitution method being used to solve the system of linear equations?
 
x + y = 6
x = y + 5
 
 
 A.
x = (x – 6) + 5
 
 B.
(y + 5) + y = 6
 
 C.
x + (y + 5) = 6
 
 D.
x + y = y + 5

jordanloveangel · Answer

@Godlovesme

godlovesme · Answer

give me a sec brb @jordanloveangel

jordanloveangel · Answer

k

bradely · Answer

x + y = 6 ----- (1) x = y + 5 ----- (2) Substitute x = y + 5 in equation (1) (y + 5) + y = 6 Option B is correct Source: http://www.mathskey.com/

precal · Answer

when you use the sub method you always have to define one of the variables.
Ie  x= something or y=something

precal · Answer

notice the second equation is x= something   
you will need to sub that equation into the first equation

precal · Answer

x=y+5    sub y+5 into the x of the first equation.
Source:  My brain and previous knowledge of how to solve systems