15×(1/3+2/5)=()×()+()×()=()7+5/9=?解方程:1/2X-3=5/8 5/8X-2/5X=5/8 X+2.8X=9.5
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 19:31:19
![15×(1/3+2/5)=()×()+()×()=()7+5/9=?解方程:1/2X-3=5/8 5/8X-2/5X=5/8 X+2.8X=9.5](/uploads/image/z/625609-1-9.jpg?t=15%C3%97%281%2F3%2B2%2F5%29%3D%28%29%C3%97%28%29%2B%28%29%C3%97%28%29%3D%28%297%2B5%2F9%3D%3F%E8%A7%A3%E6%96%B9%E7%A8%8B%3A1%2F2X-3%3D5%2F8+5%2F8X-2%2F5X%3D5%2F8+X%2B2.8X%3D9.5)
15×(1/3+2/5)=()×()+()×()=()7+5/9=?解方程:1/2X-3=5/8 5/8X-2/5X=5/8 X+2.8X=9.5
15×(1/3+2/5)=()×()+()×()=()
7+5/9=?
解方程:
1/2X-3=5/8 5/8X-2/5X=5/8 X+2.8X=9.5
15×(1/3+2/5)=()×()+()×()=()7+5/9=?解方程:1/2X-3=5/8 5/8X-2/5X=5/8 X+2.8X=9.5
解
15×(1/3+2/5)=(15)×(1/3)+(15)×(2/5)=(11)
7+5/9=68/9
解方程
1/2X-3=5/8
1/2X=5/8+3
X=(5/8+3)*2
X=29/4
5/8X-2/5X=5/8
(5/8-2/5)X=5/8
X=25/9
X+2.8X=9.5
3.8X=9.5
X=95/38
15×(1/3+2/5)=(15)×(1/3)+(15)×(2/5)=(11)
7+5/9=68/9
1/2X-3=5/8 1/2x=5/8+3=29/8 x=29/8*2=29/4
5/8X-2/5X=5/8 (25/40+16/40)x=5/8 x=41/40*5/8=41/64
X+2.8X=9.5 3.8X=9.5 x=9.5/3.8=23/3*5/19=115/57
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