(1)60%x=75 60%x÷60%=75÷60% x=125;(2)x×(1-20%)=96 x×80%=96 x×80%÷80%=96÷80% x=120;(3)45%x+42=60 45%x+42-42=60-42 45%x=18 45%x÷45%=18÷45% x=40.