Question

abs(7x+5)=abs(7x-9)
solve for x

Answer 1

abs=absolute value?

Answer 2

yes gandalf the white

Answer 3

;)

Answer 4

I prefer Gandalf the Green... until Ievel up and my profile color changes

Answer 5

\[\left| 7x+5 \right|=\left| 7x-9 \right|\]

Answer 6

thats it but i need x

Answer 7

I know... working on it...

Answer 8

sorry, it's been a while... I thought that you had to change all the negative signs to positive and solve. But that doesn't seem to be working :(

Answer 9

\[\frac{2}{7}\]

Answer 10

how u solve, zarkon?

Answer 11

solve

7x+5=-(7x-9)

Answer 12

... why? what did u do?

Answer 13

there are 4 possibilities but only one gives a valid solution

Answer 14

(7x+5)=(7x-9)
(7x+5)=-(7x-9)
-(7x+5)=(7x-9)
-(7x+5)=-(7x-9)

Answer 15

I guess 2 give a valid solution

Answer 16

how do u know that the others are wrong?

Answer 17

solve them

Answer 18

7x+5=7x-9
5=-9

Answer 19

got it.

Answer 20

one way to do these is to square both sides:
49x^2 +70x +25 = 49x^2 - 126x + 81
196x = 56
x = 56/196

Answer 21

this checks out LHS = 7, RHS = -7 - absolute value 7

Answer 22

-same as zarkon as 56/186 = 2/7