SOLUTION: trying to get the right steps to solve 3 problems. 1. -3(x-10) > -x + 5 ( I know the answer is x < 25/2, but she wants it done in set notation and steps shown) 2. 6 + 5z = 12

Algebra ->  Probability-and-statistics -> SOLUTION: trying to get the right steps to solve 3 problems. 1. -3(x-10) > -x + 5 ( I know the answer is x < 25/2, but she wants it done in set notation and steps shown) 2. 6 + 5z = 12      Log On


   

Question 550818: trying to get the right steps to solve 3 problems.
1. -3(x-10) > -x + 5 ( I know the answer is x < 25/2, but she wants it done in set notation and steps shown)
2. 6 + 5z = 12(3-z) (I have no clue where to start)
3. 5 - 4/5x = -11
Thank you
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
-3%28x-10%29+%3E+-x+%2B+5+
-3x%2B30%3E-x%2B5 distributed -3
30%3E2x%2B5add 3x
25%3E2xdivide by 2
25%2F2%3Ex
{x|x<(25/2)}
.
6+%2B+5z+=+12%283-z%29
6%2B5z=36-12zdistributed 12
6%2B17z=36added 12z
17z=30subtracted 6
z=30%2F17divided by 17
{z|z=(30/17)}
.
5-%284%2F5%29x=-11subtract 5
%28-4%2F5%29x=-16multiply by -1
%284%2F5%29x=16multiply by 5/4
x=20
{x|x=20}