SOLUTION: Can you please help me solve this: t + u = 7 10t + u + 9 = 10u + t 10t-t+u-10u=-9 9t-9u=-9 9(7-u)-9u=-9 63-9u-9u=-9 -18u=-9-63 u=9 t+u=7 t+9=7 t=7-9 t=-2

Question 149526: Can you please help me solve this:
t + u = 7
10t + u + 9 = 10u + t
10t-t+u-10u=-9
9t-9u=-9
9(7-u)-9u=-9
63-9u-9u=-9
-18u=-9-63
u=9
t+u=7
t+9=7
t=7-9
t=-2
Found 2 solutions by tryin2bhelpful, deanice_01@yahoo.com:
Answer by tryin2bhelpful(6) (Show Source): You can put this solution on YOUR website!
Alright in this one you have a couple steps...
First we're gonna start with the longer equation and simplify it.
You have:
10t+u+9=10u+t
first you're going to get all your t's on one side:
(-t)10t+u+9=10u(-t)+t
9t+u+9=10u
Now you're gonna get all your u's on one side:
9t(-u)+u+9=10u(-u)
so you end up with...
9t+9=9u
Now you're gonna factor out a nine from the whole equation...
9(t+1)=9u
Now, you can divide both sides by nine, so you're left with a clean equation.
t+1=u
Ok... you're gonna add the other equation in now... Don't be scared lol.
We're going to isolate the t variable in the first equation so...
t+u=7
t=-u+7
now we'll subsitute this equation for t in the other equation like this:
t+1=u
(-u+7)+1=u
Solve
-u+8=u
8=2u
u=4
wualla!! you got it!
Answer by deanice_01@yahoo.com(3) (Show Source): You can put this solution on YOUR website!

Can you please help me solve this:
t + u = 7
10t + u + 9 = 10u + t
10t-t+u-10u=-9
9t-9u=-9
9(7-u)-9u=-9
63-9u-9u=-9
-18u=-9-63
u=9
t+u=7
t+9=7
t=7-9
t=-2
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