First, isolate the #x# terms on one side of the inequality and the constants on the other side of the inequality while keeping the inequality balanced:
#4x + 3 - color(red)(4x) < 5x - color(red)(4x)#
#4x - color(red)(4x) + 3 < (5 - 4)x#
#0 + 3 < 1x#
#3 < x#
To solve in terms of #x# we must reverse or "flip" the inequality: