Question

substitution method
8x-4y=36
y=2x+9

Answer 1

This question must be incorrect, can you check if you copied it down correctly?

Answer 2

8x - 4(2x+9) = 36
8x - 8x - 36 = 36
lols , the x vanishes

Answer 3

so no solution

Answer 4

replace y in the 1st eq 8x-4(2x+9)-36=0
8x-8x-36-36=0
-72=0????? not true....as Camp said check if u've written it right or may be no solutions

Answer 5

thanks. I did write it down correctly so there is no solution

Answer 6

ok :)