Question

解方程。 (1)0.7x+6.2 =30 (2)5x+ 1.6x=19.8 (3)x= (4)x÷0.6=×

Answer 1

(1)0.7x+6.2 =30         解:0.7x=30-6.2              0.7x= 23.8                   x=34 (2)5x+ 1.6x=19.8        解:6.6x=19.8                  χ=3 (3)x=     解:x=÷          x= (4)x÷0.6=× 解:x÷0.6=              x=