# Math Help - Some simple absolute value equations

1. ## Some simple absolute value equations

Dear forum members,

I have two equations to solve

b) (x-11)=16

c) (x+1)=6

NOTE! PLEASE PRETEND THE PARENTHESES ARE ABSOLUTE VALUE BARS.

I know how to solve them, but there is something in my teacher's answers which baffles me.

for b) she wrote x=-5 or X=-7 and for c) =-7 and x=5

Why use or in b and then and in c?

2. Originally Posted by Coach
I have two equations to solve

b) (x-11)=16

c) (x+1)=6

I know how to solve them, but there is something in my teacher's answers which baffles me.

for b) she wrote x=-5 or X=-7 ... Wrong. $x=-5~\vee~ x=27$

and for c) =-7 and x=5 ... Wrong. $x=-7~\vee~ x=5$

...
Definately the "and" is wrong.

I've attached a drawing which gives the solutions of the equations graphically.

The first equation is drawn in black, the second one in red.