Question

In the below system, solve for y in the first equation.

x - 3y = -6
2x - 7y = 10

1/3x + 2
-1/3x + 6
-x + 2
-1/3x + 2

Answer 1

x - 3y = -6

if you add -x to both sides
-x + x - 3y = -6 -x

can you simplify -x + x on the left side ?

Answer 2

just x right?

Answer 3

-x + x means

the same as x - x
you have 1 x and take away an x. How many x's ?

Answer 4

x - 3y = -6

if you add -x to both sides
-x + x - 3y = -6 -x

the -x + x is 0 x's (no x's), so we can simplify this to
-3y = -x -6 ( put the -x first, because the answers have x first)

now divide both sides by -3
that means EVERY TERM on both sides

write /-3 under each term
what do you get ?