Question

use subsitute to solve x-3y=-4
2x+6y=5

Answer 1

The equation x-3y=-4 make x the subject
x=3y-4
Then 'substitute' the x into the second equation
2x+6y=5
\[2(3y-4)+6y=5\]

\[6y-8+6y=5\]

Answer 2

\[12y=13\]
\[y=\frac{ 13 }{ 12 }\]

Answer 3

to find the value of x, substitute y=13/12 into any of the two original equations

Answer 4

What did I do wrong? I have 12y=11or y=11/12

Answer 5

What was the x expression that you substituted into the second equation? @Bam13

Answer 6

I see i added instead of multiplying by a mistake 2(-4+3y) -6+6y oops lol thanks so much

Answer 7

all good! A medal will be nice :)