Question

数学解方程

（x＋1.2）×4.5＝42

Answer 1

（x＋1.2）×4.5＝42
X+1.2=42*2/9
X=28/3-11/5
X=107/15

Answer 2

（x＋1.2）×4.5＝42
整理得，
(x+6/5)*9/2=42
x+6/5=42/(9/2)

x+6/5=28/3
x=28/3-6/5
x=140/15-18/15
x=122/15

Answer 3

4.5x+4.5乘以1.2=42
4.5x=4.5x乘以5.4=42
4.5x=4.5x乘以10分之1
x=10分之1除以4.5
x=9分之2

Answer 4

(x+1.2)*4.5=42
x+1.2=42/4.5
x+1.2=28/3
x=28/3-1.2
x=28/3-3.6/3
x=24.4/3
x=122/15

Answer 5

（x+1.2)*4.5=42
x+1.2=42/4.5
底下你自己算