Question

Solve for x: |2x + 6| − 4 = 20

Answer 1

@divu.mkr
is it 9 and -15?

Answer 2

9

Answer 3

\(\bf |2x + 6| - 4 = 20 \implies |2x + 6| = 20+4 \implies
\begin{cases}
+1(2x + 6) = 20+4\\\quad \\
\bf -1(2x + 6) = 20+4
\end{cases}\)

Answer 4

same gig as before

Answer 5

2x+6-4=20
2x+2=20
x+1=10
hence x=9

Answer 6

i know it's 9 what is the second one?

Answer 7

yep you are correct

Answer 8

replace in place of + as - for -2x-6-4=20
-2x-10=20
-x-5-10=0
-x-15=0
hence x=-15