解方程:①8.8+4X=40

2025-12-14 22:13:22
推荐回答(5个)
回答1:

①8.8+4X=40,
  8.8+4X-8.8=40-8.8,
       4X÷4=31.2÷4,
           X=7.8;

②12X÷3=16,
12X÷3×3=16×3,
  12X÷12=48÷12,
        X=4;

③6X+2X=56,
     8X=56,
  8X÷8=56÷8,
      X=7;

④3X-0.5X=5,
     2.5X=5,
2.5X÷2.5=5÷2.5,
        X=2;

⑤0.24X-1.8=4.2,
0.24X-1.8+1.8=4.2+1.8,
        0.24X=6,
  0.24X÷0.24=6÷0.24,
            X=25;

⑥3X+5×0.3=4.5,
     3X+1.5=4.5,
 3X+1.5-1.5=4.5-1.5,
      3X÷3=3÷3,
          X=1.

回答2:

8.8+4x=40
解:4x=40-8.8

4x=31.2

x=31.2/4

x=7.8

回答3:

8.8+4X=40
4X=40-8.8
4X=31.2
X=31.2除以4
x=7.8

回答4:

解:4X=40-8.8

4X=31.2

X=7.8

回答5:

4X=40-8.8
4X=31.2
X=31.2÷4
X=7.8