Question

Heys can some one help me with this? I dunno wudda do...

Answer 1

-2x - 2y = 26
-x + 3y = -3

Answer 2

Needs to be solved using distribution guys!

Answer 3

distribution is same thing as substitution.
\(\large\color{slate}{ -2x - 2y = 26 }\)
\(\large\color{slate}{ -x + 3y = -3 }\)

you rearrange one of the equation for 1 variable (in terms of the other variable), and (substitute into the other equation:)

Answer 4

if you need an example, ask me, and I will give you one (or two and even three if you would like to).

Answer 5

I think i understand now mates...thanks :D

Answer 6

I will put up an answer check, and will make a point about a method efficiency.

Answer 7

\(\scriptsize\color{ slate }{\scriptsize{\bbox[5pt, blueviolet ,border:2px solid blueviolet ]{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ }}}\)
Just to verify the answer, and show the efficiency of elimination.
\(\large\color{slate}{ -2x - 2y = 26 }\)
\(\large\color{slate}{ -x + 3y = -3 }\)

multiplying the 2nd equation times -2
\(\large\color{slate}{ -2x - 2y = 26 }\)
\(\large\color{slate}{ 2x - 6y = 6 }\)

adding them:
\(\large\color{slate}{ 0x - 8y = 32 }\)

so, \(\large\color{slate}{ y = -4 }\)

(then, solving for x is not hard)

\(\scriptsize\color{ slate }{\scriptsize{\bbox[5pt, blueviolet ,border:2px solid blueviolet ]{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ }}}\)

Answer 8

mhmm me unda stand
I just spent a few minutes poking around my lesson finding more information lol

Answer 9

sure:)

Answer 10

btw, there are another 2 methods to solve a linear system (in general).
graphing the equations (and intersection of the 2 is a solution)
using matrix

( to set a matrix to [1 0 | x ]
[0 1 | y ] )

Answer 11

I guess though, they choose a method for you, and not the most efficient one-:(
but you can do it! good luck!