Question

5x+1=3x-7

Answer 1

What's your approach so far?

Answer 2

I took away 3x from 5 x, then subtracted 1 from both sides to get 2x = 7

Answer 3

See what i've written below

1+5x = 3x-7
+7 +7
add 7 to both sides

then subtract -5x from both sides
8+5x = 3x
- 5x -5x

you get the following and then divide both sides by -2
8 = -2x

x = -4

5(-4)+1 = 3(-4) = -12-7 = -19
-20+1
-19 = -19

so x = -4

Answer 4

=6 **

Answer 5

@raphaelll you can check your answer by plugging it into the original equation

Answer 6

and whatever answer you get should be the same on both sides.

Answer 7

Algebra 1, so fun...

Answer 8

@raphaelll Does anything seem confusing?

Answer 9

@raphaelll solve this for me based on what we did

3x+1 = 2x+6

Answer 10

3x - 2x

1x+1 = 6

x = 5

Answer 11

@raphaelll nice work, can you plug that answer back into the original equation for me to check 3x+1 = 2x+6?

Answer 12

you then will see the point of this

Answer 13

15+1 = 10+6

Answer 14

@raphaelll that's the methodology you need to follow when doing these problems

Answer 15

Thanks for that, i've got another question i'm not too sure about if you don't mind.

Q = 5000 - 10P

Given that Q is the quantity demanded and P is the price, rearrange the following equation to make P the subject

Answer 16

is it just dividing 5000 by 10 to work out what P is

Answer 17

Q = 5000 -10P

Q+10P = 5000-Q
-Q

10P = 5000-Q
10 10

P = 500-Q/10

Answer 18

i hate negatives so I added P to both sides first

Answer 19

Subtracted Q and then divided by 10. but your idea is correct.

Answer 20

@raphaelll

Answer 21

I knew one of the steps, just not the rest of the equation haha, thanks for that

Answer 22

No problem

Answer 23

try this

y = 1000+2C

solve for C

Answer 24

y=1000+2c

Y-2c=1000-y

2c=1000-y

c=500-y/2