Question

what is the value of y so that the ordered pair (5,y) is a solution to the equation -5x + y = -40?

Answer 1

you have to find y value when x=5
substitute x for 5 solve for y

Answer 2

25

Answer 3

negative 25

Answer 4

how did you get that? post your work

Answer 5

well 5*5 is 25 but since the first 6 is negative it would make it negative -25

Answer 6

the first 6 ? what do you mean by that ?

Answer 7

not 6 miss typed

Answer 8

5

Answer 9

\[-5x + y = -40 \]
replace x with 5
\[-5(5) + y = -40 \]
there is negative sign so -5 times 5 = -25
to isolate y you should move the number -25 to the right side

Answer 10

thats what i did

Answer 11

nice!

Answer 12

so what's the next step ? :)

Answer 13

well thats were get stuck

Answer 14

\[-25+y=-40\]
25 is negative at left side. how would you cancel it out ?

Answer 15

25 +40 = 65

Answer 16

but since the 25 is a negative it would be _65

Answer 17

it's -40 that would stay negative
you have to add 25 both sides so you can cancel out -25 from left side.

Answer 18

-25 +25 = 0

Answer 19

right what about right side ?
because we should add 25 to both sides

Answer 20

-40 +25=15

Answer 21

-15

Answer 22

correct?

Answer 23

looks good !

Answer 24

so am i right

Answer 25

wrong

Answer 26

yes -15 is correct
you can check your answer when x =5 y =-15
substitute x and y with these values \[-5(5)+(-15)=-40\]
solve left side
both sides are equal? that meas (5,-15) is the solution of that equation