(1)x÷0.6=4.8, x÷0.6×0.6=4.8×0.6, x=2.88;(2)2x+2.4×3=42.2, 2x+7.2=42.2, 2x+7.2-7.2=42.2-7.2, 2x÷2=35÷2, x=17.5;(3)10x+x=7.3+3.7, 11x=11, 11x÷11=11÷11, x=1.