Question

Can anyone help Me figure out how I'm supposed to check these? I'll fan and give medal

Answer 1

Here's an example in my book but I still don't understand

Answer 2

so what has happened in the example is that initially the equation

-x + 3 = -2x + 5

so you need to solve for x

the the checking part is using the solution to see if it makes sense

this is done by replacing x in the original equation with 2 and seeing if it makes sense.

hope that helps

Answer 3

so if you have the equation

-x + 3 = -2x + 5 add 2x to both sides
2x 2x
------------------
x + 3 = 5 now subtract 3 from both sides
-3 -3
------------
x = 2 so that's the solution. Put it into the original equation

-2 + 3 = -2x2 + 5 do the arithmetic

1 = 1 so the solution x = 2 is correct...

Answer 4

@campbell_st I'm so confused can you at least walk me through the first problem so I will understand what I've wasted 30 minutes on(I waste time a lot)

Answer 5

ok... so the equation is

-x + 3 = -2x + 5 and you need to solve for x... any thoughts on the 1st step..?

Answer 6

or just post the 1st problem

Answer 7

Oh i just realizedthe pic i posted of my questions didnt go through @campbell_st

Answer 8

ok

Answer 9

can you repost the question

Answer 10

yeah i was trying to upload the photo but its not working so I'm just gonna use the site

Answer 11

\[3x + 7 = 16 + 2x\]

Answer 12

ok... so any thoughts...?

Answer 13

My work for solving them was
1) 3x - 2x = 16 - 7
2) x= 16 - 7
3) x= 9

Answer 14

I solved the equation by myself before I came back on here but its the "Check" part that I'm confused about

Answer 15

ok.. so the solution is perfect...

the check idea is to simply substitute your solution, x = 9
back into the original equation to see if its true

\[does~~~3 \times 9 + 7 =16 + 2 \times 9\]

if it does then you know your solution is right

Answer 16

@campbell_st thank you so much this makes way more sense now