Question

x+(x+12)*(4/5)=42 的解 怎么解啊?

x+(x+12)*(4/5)=42 的解 怎么解啊?

Answer 1

x+(x+12)*(4/5)=42
解：x+x*4/5+12*4/5=42
9/5x=42-48/5
x=18

Answer 2

x+(x+12)*(4/5)=42
x+4/5x+48/5＝42

1.8x＝42-9.6＝32.4
x＝18

Answer 3

x+(x+12)*(4/5)=42
x+4/5x+48/5＝42

1.8x＝42-9.6＝32.4
x＝18

Answer 4

0.8x+x+9.6=42
1.8x=32.4
x=18