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x+7/12=7/8=?

3/8+x=7/12 ×=7/12-3/8 =14/24-9/24 =5/24

x+11/12=y+9/10 x-y=9/10-11/12=54/60-55/60=-1/60

见图

=(1-1/8)÷3/8 =7/8÷3/8 =7/3

解:7x3+x=14x+4x24 21+x=14x+96 13x=21-96 13x=-75 x=-75/13 答:原一元一次方程的解是x=-75/13。

已知x+11/12=y+9/10=z+7/8,那么xyz关系是()

x=7/12÷7/8 x=7/12×8/7 x=8/12=2/3

x= 4/7➗8/12 =4/7×12/8 =6/7

(11/12)÷(7/8)+(13/12)X8 =(11/12)X(8/7)+(8/12)X13 =(8/12)X(11/7+13) =(2/3)X(11/7+91/7) =2X102/(3X7) =2X34/7 =68/7 =9又7分之5

(1)7.8:x=12:1.6 12x=7.8×1.6 12x=12.48 12x÷12=12.48÷12 x=1.4(2)x:0.5=1.2:4 1.2x=0.5×1.2 1.2x=6 1.2x÷1.2=6÷1.2 x=0.5(3)1.2x+0.5=51.2x+0.5-0.5=5-0.5 1.2x=4.5 1.2x÷1.2=4.5÷1.2 x=3.75

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