x=21/4 or 5 1/4 when you simplify

2/5(x - 4) = 1/2 2/5x - 8/5 = 1/2...multiply both sides by common denominator of 10 4x - 16 = 5 4x = 5 + 16 4x = 21 x = 21/4 or 5 1/4 or 2/5(x - 4) = 1/2....multiply both sides by 5/2 x - 4 = 5/4 x = 5/4 + 4 x = 5/4 + 16/4 x = 21/4 or 5 1/4