1.) 3-2a<7
Subtract 3 from each side:
-2a<4
Divide both sides by -2, when you divide both sides of an inequality by a negative number, you also need to flip the direction of the inequality sign.
a >-2
Answer is C.
2.) 3m>9
Divide both sides by 3:
m >3
Answer is D.
3.) |x + 6| > 15
Remove the absolute value term and add a + and - to the right side:
x+6 > +/- 15
Now make 2 equations and solve x for both:
x +6<15
x >9
and
x+6 >-15
x<-21
The answer is B.
