l2a+1l=1

Question

l2a+1l=1

anonymous · Answer

that is better
this is an absolute value equation so it requires solving two separate equations

anonymous · Answer

one is just what you see as if the absolute value signs are not there $$2a+1=1$$ which you can solve in two easy steps

anonymous · Answer

the other is what you get when you change the sign of the number on the right, i.e $$2a+1=-1$$ again two easy steps to solve

0_0youscareme · Answer

so you pretend the absolute value sign is not there?

anonymous · Answer

for one of them yes, but you have to solve two all together

anonymous · Answer

so lets go ahead and solve them 
start with $$2a+1=1$$ and subtract 1 from both sides, what do you get?

0_0youscareme · Answer

you get 2a=0

anonymous · Answer

right 
which means $a=?$

0_0youscareme · Answer

0?

anonymous · Answer

yes !
now on to the next equation

anonymous · Answer

the next one is $$2a+1=-1$$ again subtract 1, what do you get?

0_0youscareme · Answer

2a=-2

anonymous · Answer

right, and now divide by 2

0_0youscareme · Answer

A=-1

anonymous · Answer

yes 
lets recap

anonymous · Answer

if you have an absolute value equation like $$|2x+3|=5$$ you have to solve two equations:$$2x+3=5$$ and also $$2x+3=-5$$

0_0youscareme · Answer

so on a graph it would look like |dw:1439951388453:dw|