Question

帮我解几道小学方程x除9=20..2.1x=0.84...x除1.5=3.5x=40...x除0.7=1.2.18x=3

Answer 1

x除9=20

x=20×9

x=180

2.1x=0.84

x=0.84÷2.1

x=0.4

x除1.5=3

x=3×1.5

x=4.5

5x=40

x=40÷5

x=8

x除0.7=1.2

x=1.2×0.7

x=0.84

18x=360

x=360÷18

x=20