math
posted by Mimi .
solve
2│2x7│+11=25

You want to get the absolute value portion of the equation alone first. They you can find what x would equal if it were (2x7) = blah and if (2x7) = blah.

2„ 2x7„ +11=25
11 11
2„ 2x7„ =14
4x +14 = 14
14 14
4x = 0 Divide both by 4
x = 0
Check
2„ 2(0)7„ +11=25
2„ 0 7„ +11=25
2„ 7„ +11=25
14 + 11 =25
25 =25 
in addition to x=0, x=7
2[2x7]+11=25
2[2x7]=14
[2x7]=7
2x=14
x=7
Check
2[2(7)7]+11=25
2[7]+11=25
14+11=25
25=25 :D 
2│2x7│+11=25
2x7 = 7
then 2x7 = 7 or 2x + 7 = 7
2x = 14 or 2x = 0
x = 7 or x = 0