Question

Solve the system of equations.

5x + y = 9
3x + 2y = 4


A (−2, 5)
B (1, 4)
C (2, −1)
D (4, −4)

Answer 1

Ok number the equation first
5x + y = 9 <---equation 1
3x + 2y = 4 <----equation 2
First we need to isolate a varible (so we can do substituion)
5x =5x+ y = 9 -5x
When you do subtract 5x from both sides you get:
y=-5x+9
Now we can substitute that into E2
\[\huge~\rm~\bf3x + 2(-5x+9)= 4\]Solve for x

Answer 2

There are so many of these... I'm pretty sure that most people are too lazy to plug in the values lol

Answer 3

-2X+11=4

Answer 4

So we are solving for x

Distribute 2 into the parehteses

Answer 5

What is 2 times -5?

Answer 6

-10

Answer 7

Good
what is 2 x 9?

Answer 8

18

Answer 9

Good so now we have
\[\huge~\rm~3x−10x+18=4\]
Now we need to combine like terms
\[\huge~\rm~\bf 3x-10x=?\]

Answer 10

7X

Answer 11

* -7x
3-10=-7
Now this is what we have
\[\huge~\rm~\bf−7x+18=4 \]
We need to subtract 18 from both sides
\[\huge~\rm~\bf−7x+18-18=4-18 \]
\[\huge~\rm~\bf−7x=4-18 \]
4-18=?

Answer 12

-14

Answer 13

Perfect! :)
\[\huge~\rm~\bf−7x/-7=−14/-7\]
Now all we have to do is divide both sides by -7
x=?

Answer 14

-7X,-14

Answer 15

-7/-7=1
so just x
What is -14/-7?

Answer 16

2

Answer 17

SO c

Answer 18

Yep =)

Answer 19

tHANK YOU SO MUCH CAN U HELP ME WITH ONE MORE i WILL OPEN A NEW QUESTION

Answer 20

Okie ^-^ and yw