Question

Solve the linear system of equations.
7x-4y=2
y=2x+3

Answer 1

First put 2x+3 into the first equation like this:

7x-4(2x+3)=2

Answer 2

7x-4(2x+3)=2
7x-8x+12=2 ???
-1x-12=2
-1x=14
did i do that right?

Answer 3

Then you distribute:

7x-8x-12=2

Answer 4

x=-14

Answer 5

Check again, -12 is negative because -4*3 turns into a negative 12

Answer 6

Correct!

Answer 7

Plug in -14 into y=2x+3

Answer 8

y=2(-14)+3

Answer 9

y=2(-14)+3
y=-28+3=-25

Answer 10

Yes.

Answer 11

Ok thanks