ALGEBRA 2

If │2x – 19 │= 21; Find  x

Solution

±(2x – 19 )= 21

2x -19= 21    OR   –(2x-19) = 21

2x – 19 = 21    OR   -2x+19= 21

2x = 21 + 19    OR   -2x= 21-19

2x = 40     OR   -2x  =  2

2      2                2        2

x = 20  OR  x = 1

Hence x = 20 OR x = 1     

TRY THIS...............................

If │4x – 12 │= 48; Find  x