Question

Solve by elimination
3x + y = 20

x + y = 12

Answer 1

You have to multiply one of the equations in a way that when you add them, one of the variables cancels. Basically, how can you multiply one of your equations so that you have the same x or y in each equation, but one being negative and one being positive? It can be easily done to get y's to cancel in this one.

Answer 2

do i multiply it by -3

Answer 3

You could multiply the bottom by negative 3 to get rid of x, yes. Also notice you can simply multiplyit by negative 1 to get rid of y. Both work :3

Answer 4

Just make sure you multiply EVERYTHING in the equation by negative 3 or negative 1, including theother side of the equal sign.

Answer 5

kk dont leave im going to solve it and ask you to see if i am right that okay

Answer 6

alrighty.

Answer 7

i got (4,8)

Answer 8

Right :3

Answer 9

thank you

Answer 10

Np.