Question

What is the solution for this system of linear equations?
y=-3x-5
y=-8x-25

so -8x-25=-3x+5

Answer 1

@jim_thompson5910 can you work through this with me?

do I subtract -3 or add it?

Answer 2

-8x +3x = 5 + 25

Answer 3

now it's arithmetic

Answer 4

y=-3x-5

-8x-25=-3x-5 ... plug in y = -8x-25

If you want to move the -3x over, you add 3x to both sides to get

-8x+3x-25 = -3x+3x - 5

-5x - 25 = -5

Answer 5

:) it's great ur asking for someone to work it with u rather than just wanting the answer! :)

Answer 6

so what's next after you get -5x - 25 = -5

Answer 7

subtract -5 from -25?

Answer 8

how about adding 25 to both sides

-5x - 25 = -5

-5x - 25+25 = -5+25

-5x +0 = 20

-5x = 20

We do this because we want to move the -25 over

Answer 9

okay, so x=-4?

Answer 10

good

Answer 11

and you know what to do to get y

Answer 12

and y=7? :)

Answer 13

yep

x = -4
y = 7

Answer 14

@HawkCrimson :)

Answer 15

thank you @jim_thompson5910 !! :)

Answer 16

you're welcome

Answer 17

:)