Question

解方程3x÷0.2=0.6 5x-3.7=6.3 0.5y+3=6 5x-1.54=6.01...

解方程3x÷0.2=0.6 5x-3.7=6.3 0.5y+3=6 5x-1.54=6.01 2x-21.04=22.12 2x+23.6=48.2

Answer 1

①3x÷0.2=0.6
 3x÷0.2×0.2=0.6×0.2
           3x=0.12
        3x÷3=0.12÷3
            x=0.04；

  ②5x-3.7=6.3
5x-3.7+3.7=6.3+3.7
        5x=10
     5x÷5=10÷5
         x=2；

  ③0.5y+3=6
  0.5y+3-3=6-3
      0.5y=3
 0.5y÷0.5=3÷0.5
         y=6；

   ④5x-1.54=6.01
5x-1.54+1.54=6.01+1.54
          5x=7.55
        5x÷5=7.55÷5
            x=1.51；

    ⑤2x-21.04=22.12
2x-21.04+21.04=22.12+21.04
            2x=43.16
         2x÷2=43.16÷2
             x=21.58；

   ⑥2x+23.6=48.2
2x+23.6-23.6=48.2-23.6
          2x=24.6
       2x÷2=24.6÷2
           x=12.3．