Question

Help to make sure I have this question done right: 5t + 12 = 4 - 3t solve for t

Answer 1

t=-1

Answer 2

Thats what I got, however I need to prove the solution which I don't know how to do that.

Answer 3

5t-3t=2t it then becomes 3t+12=4 minus 12 from both sides and u get negative one

Answer 4

Yes, I have the solution but I need to prove it.

Answer 5

@cahit Please don't give out answers without explanation.

5t + 12 = 4 - 3t
The first step should be adding 3t to both sides (remember - opposites)

Answer 6

Hi tyteen4a03, I've already gone over the answer with someone but my question now is how do I prove my solution is correct?

Answer 7

@joshhhunt Oh... Split the equation into two parts, the Left Hand Side (LHS) and Right Hand Side (RHS), then plug in the values and see if two sides are equal.

Answer 8

I don't quite understand how I do that, could you give me an example?

Answer 9

get a piece of paper and write out the problem is step one, i'll walk u through

Answer 10

This is what I have for solving it:
5t + 12 = 4 - 3t
5t + 3t = 4 - 12
8t = -8
t = -1

Answer 11

so there u proved it

Answer 12

proving it is showing work

Answer 13

I'm a little confused because it's a two part question, the first is solve for t and the second is prove it. I wouldn't of thought I put the same answer for both.

Answer 14

@shatikat That is not proving.

Try this: 6x - 2 = 2x + 4
The correct solution is x = 3/2. Now split the two parts:

LHS = 6x - 2
Sub. x = 3/2 into LHS:
6(3/2) - 2
= 7

RHS = 2x + 4
Sub. x = 3/2 into RHS:
2(3/2) + 4
= 7
= LHS

Therefore the answer for x is correct.

Answer 15

Ahh I think I understand, so what I do is:
LHS = 5t + 12
Sub. x = -1 into LHS:
5 x -1 + 12
= 7

and then same for the RHS?

Answer 16

Yes. Make sure you draw a conclusion from what you got in RHS (i.e = LHS) then use this information to draw a final conclusion.