Question

x+3.2＝4.6 x-1.6＝4 15-x＝2 1.6x＝6.4 15-x＝2+ 2.1÷x＝3的检验是什么

Answer 1

x+3.2＝4.6

x=4.6-3.2

x=1.4

x-1.6＝4

x=4+1.6

x=5.6

15-x＝2

x=15-2

x=13

1.6x＝6.4

x=6.4÷1.6

x=4

15-x＝2

x=15-2

x=13

2.1÷x＝3

x=2.1÷3

x=0.7