+130511 How do you solve 7-9x-(x+12) < 25?
---------------------------------------------------------------------------------------------------------------------------
Let's start by simplifying the left side - note that the "-" outside the parenthesis makes both the "x" and the "12" inside negative !! We have
-10x - 5 < 25 add 5 to both sides
-10x < 30 divide by -10 on both sides and reverse the inequality sign (as we always do when multiplying or dividing an inequality by a negative)
x > -3
1. Combine like terms.
-9x combines with -x to make -10x
7 combines with 12 to make 19
Your equation should look like this now: -10x+19 < 25
2. Solve for x
Subtract 19 from both sides
At this point your equation should look like this -10x < 6
Then, you divide both sides by -10
Then you'll get x > -6/10 (the inequality sign switches because you divide by a negative)
3. Simplify
x > -6/10 simplifies to x > -3/5
x > -3/5 is your answer!
+130511 How do you solve 7-9x-(x+12) < 25?
---------------------------------------------------------------------------------------------------------------------------
Let's start by simplifying the left side - note that the "-" outside the parenthesis makes both the "x" and the "12" inside negative !! We have
-10x - 5 < 25 add 5 to both sides
-10x < 30 divide by -10 on both sides and reverse the inequality sign (as we always do when multiplying or dividing an inequality by a negative)
x > -3
+118723 That was a really good attempt anonymous. I like to see people 'having a go' 
When ever there is a negative or a negative number in front of a bracket you have to be really careful to expand the bracket properly BEFORE you collect like terms. It is very easy to make a mistake.
