Question

Solve the equation for y and then find the value of y for the given x-value.

5x + y = 10

A. x = -2
B. x = 3

Answer 1

Ok, what do we do to cancel out an addition?

Answer 2

subtract

Answer 3

?

Answer 4

Correctomundo! So, what would we subtract to get y by iteslf?

Answer 5

5?

Answer 6

That 5 is attached to a variable so you have to move that entire unit. What would it look like after you have done this?

Answer 7

y=10

Answer 8

Nope, you have to move the 5 AND the variable it is attached to.

\(\color{red}{5x} + \color{blue}{y} = \color{green}{10} \)

So what do you think now?

Answer 9

im not sureeee

Answer 10

?

Answer 11

:(

Answer 12

@austinL

Answer 13

Sorry, got distracted! You need to subtract 5x from both sides.

\(\color{blue}{y} = \color{green}{10}-\color{red}{5x}\)

Answer 14

okay.

Answer 15

y = 5x?

Answer 16

No,

What I put up above is what y is.

Answer 17

oh so thats the answer

Answer 18

No, then according to the instructions you need to input those values of x and solve for y.

Answer 19

then what?

Answer 20

That is all you need to do!

Answer 21

input them wehre im so confused

Answer 22

????????????????

Answer 23

Put them in where it says x.....

Answer 24

but theres only one place to put one of the x's

Answer 25

Correct, it gives you two parts of the question.

A. x = -2
B. x = 3

You then plug those into the equation that we made.

y=10-5(x)

Do you think you can solve it from there?

Answer 26

can u show me cause im not getting what u saying

Answer 27

For part A,

\(x=2\)

We put that into the equation,

\(y=10-5x\Rightarrow10-5(2)\)
\(y=0\)

Make sense? Now try part B for yourself! :D

Answer 28

it was -2

Answer 29

Ok, then
\(y=20\)