1.2X+1.5(50-X)=66

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/19 17:36:00
1.2X+1.5(50-X)=661.2X+1.5(50-X)=661.2X+1.5(50-X)=661.2X+1.5(50-X)=661.2x+75-1.5x=66-0.3x=66-750.3x=-

1.2X+1.5(50-X)=66
1.2X+1.5(50-X)=66

1.2X+1.5(50-X)=66
1.2X+1.5(50-X)=66
1.2x+75-1.5x=66
-0.3x=66-75
0.3x=-9
x=9/0.3
x=30

1.2X+1.5(50-X)=66
1.2X+75-1.5X=66
1.5X-1.2X=75-66
0.3X=9
X=9/0.3
X=30

1.2X+1.5(50-X)=66
1.2X+75-1.5X=66
-0.3X+75=66
75-66=0.3X
9=0.3X
X=30

1.2x+1.5(50-x)=66
1.2x+75-1.5x=66
75-66=1.5x-1.2x
9=0.3x
x=30

1.2X+1.5(50-X)=66(方程两边同时乘以10)
12x+15(50-x)=660(拆括号)
12x+750-15x=660(合并同类项,移向)
-3x=-90(方程两边同时除以-3)
x=30