Question

What is the value of y in the solution to the following system of equations?
9x + 6y = 8
3x + 2y = 1

Answer 1

we can solve it by eliminating x....

Answer 2

by multiplying -3 to equation 2 then add the result to equation 1, we can eliminate x, thus we can solve y alone...

Answer 3

can you do it @harleeekoon ?

Answer 4

no

Answer 5

ok... i tried it but it eliminate y also.... let me try a different approach....

Answer 6

let us try by substitution...

Answer 7

Orion1213 you didn't make any mistakes when you tried to eliminate x and y was eliminated as well

Answer 8

yup but i'm trying to look a solution in solving y...

Answer 9

there are no solutions

if you multiply both sides of equation 2 by 3 you get

9x + 6y = 3

so we have this new system

9x + 6y = 8
9x + 6y = 3

Answer 10

the left side is equal to some value, say z,

let z = 9x + 6y

therefore, we have z = 8 and z = 3

that's a contradiction. The value z can only be equal to ONE value at a time

Answer 11

ok...

Answer 12

graphing the two lines, you'll find that they are parallel lines that never intersect

Answer 13

got your point... i forgot that we can graph them since they are simply a line... thanks... i hope @harleeekoon , understand the situation... i learned to you a different approach and analysis....