Question

Can someone help me?

|9x + 4| - 11 = -4

Answer 1

First, isolate the absolute value function by adding 11 to both sides. What do you get?

Answer 2

Follow those steps:

1) add 11 on both sides
2) subtract 4 on both sides
3) Divide both sides by 9

Answer 3

|9x +15| = -15 ?

Answer 4

@hba that will only give one solution
this should give two

since we will have |f|=a where a is positive
|f|=a means
f=a or f=-a

Answer 5

Add 11, not subtract

Answer 6

well 11-4 isn't -15

Answer 7

oh lol i did -11-4 so its actually 7

Answer 8

Great now you have\[\left| 9x+4 \right| = 7\]One solution is when the quantity (9x+4) is positive, so solve\[9x+4=7\]The other solution is when the quantity (9x+4) is negative. So, solve\[-\left( 9x+4 \right)=7\]Then you'll have the complete solution

Answer 9

so the first one is x = 1/3
and the 2nd one is x = -11/9 ?

Answer 10

Excellent. Well done!

Answer 11

yay thx

Answer 12

you're welcome