Question

Help please, medal will be given

Linear Equation in One Variable

Translate the Word Problem into a System of Equations


On a certain day a snack bar sold 120 ham & chicken sandwiches for 740$.
of each chicken sandwich was sold at 5$ and each ham sandwiches at 7$.
how many of each did they sell?



Mina is 2/3 as old as fe, in 20 yrs
Mina will be 7/8 as old as fe
how old to each?

Answer 1

For the first one yu'd set up the equation like this:
120=h+c
740=7h+5c
Do yu understand how I got that?

Answer 2

no

Answer 3

Well basically, yu have to find one before yu find the other. Does it give yu an answer choice?

Answer 4

nope just that

Answer 5

Okay Since im not the BEST at describing things, Ill show yu how to get the answer nd yu tell me if yu understand okay?

Answer 6

ok thanks.

Answer 7

120=h+c
740=7h+5c
The Last One Represents The Total And How Much Each Sandwich cost. ($7 for Ham and $5 for chicken.
120-c=h+c-c
So H=120-c Then Plug that into the other problem.
740$=7(120-c)+5c
Do yu understand what Im doing?

Answer 8

ok go on.

Answer 9

Distributive property is next.
740=(7*120 - 7*c)+5c
740=840-7c+5c
740=840-2c
-840 -840
-100=-2c
Can yu finish it from there?

Answer 10

where did the 5c go?
740=(7*120 - 7*c)+5c
740=840-7c+5c
740=840-2c
-840 -840
-100=-2c

Answer 11

Combine The Like Terms. -7c+5c= -2c

Answer 12

why didnt we transpose 840 to the left?

Answer 13

I Did. But to get rid of it on one side I had to subtract it. And yu have to do the same thing to both sides.

Answer 14

Thats how I got the -100

Answer 15

ok i get it, but how about the last step?

Answer 16

Divide Both Sides By -2.

Answer 17

so its -50?

Answer 18

Positive. Two Negatives Equal A Positive.

Answer 19

ok so they sell 50 each?

Answer 20

No. Yu only found C. So we have to go back and plug in the answer to find the amount of ham sandwiches. So take the first equation. 120=H+C(50)

Answer 21

Subtract 50 from both sides...
120-50=h+50-50
And you get H=70.

Answer 22

so Ham Sandwiches sold 70
and the chicken sold 100?

Answer 23

No No No. 50 chicken.

Answer 24

Remember. It has to equal 120.
120=70+50

Answer 25

ok i get it now. ill review it again later. how about the other one?

Answer 26

That one is seriously throwing me off. Can you post that question again?

Answer 27

its obvious i didnt copy it correctly.

Answer 28

so nvm that thank you for your help

Answer 29

Welcome! Good Luck!

Answer 30

btw what is let x = in no 1?

Answer 31

What Do yu Mean?

Answer 32

where did you get h+50-50

Answer 33

Ohh That Was Me Subtracting %0 From Both Sides.
120=h+50
-50 -50

Is that better?

Answer 34

thanks

Answer 35

No Problem.