Question

For the following system, use the second equation to make a substitution for y in the first equation.

Answer 1

3x + y = 2
y + 4 = 3x

Answer 2

EQN 1: 3x + y = 2
EQN 2: y + 4 = 3x

use the second equation to make a substitution for y in the first equation.
so for ENQ 2: rearrange it so it is in the form y = ...something
then put the value for ...something into eqn 1 where there is a y

ie if your 2 equations were:
EQN 1: 6x + 2y = 28
EQN2: y + 25 = 10x

you would rearrange equation 2 so it was in the form y = ...something
so y + 25 = 10x
=> y = 10x - 25

then put the value for ...something into eqn 1 where there is a y
so 6x + 2y = 28
=> 6x + 2(10x - 25) = 28
6x + 20x - 50 = 28
26x -50 = 28
26x = 78
x = 78/26
x = 3

Answer 3

does that make sense @chronicles ?

Answer 4

yes thanks

Answer 5

sweet all good