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X÷1.2=2.5解方程

x÷1.2=2.5 x=1.2X2.5 x=0.3x4x2.5 x=0.3x10 x=3

×÷4.5=1.2 解:×÷4.5×4.5=1.2×4.5 ×=5.4

(1)x÷1.2=0.5, x÷1.2×1.2=0.5×1.2, x=0.6;(2) 3 8 +x= 4 5 , 3 8 +x- 3 8 = 4 5 - 3 8 , x= 17 40 ;(3)x- 7 12 = 1 3 ,x- 7 12 + 7 12 = 1 3 + 7 12 , x= 11 12 .

13/4x=3 x=3×4/13 x=12/13

x➗0.6=1.2 解:X=1.2✖️0.6 X=0.72 检验:0.72➗0.6=1.2 1.2✖️0.6=0.72(这个算式可不写)

2(x-1/2)=8.8 x-1/2=8.8÷2 x-1/2=4.4 x=4.4+1/2 x=4.9 x-5÷6=5/6 x-5/6=5/6 x=5/6+5/6 x=5/3

x÷2=1 解:X=1x2 X=2

3÷2.5+1.2x=4.8 1.2+1.2x=4.8 1.2x=3.6 x=3 所以原方程的解为x=3.

(1.2x+1)÷0.2-x÷0.5=1 方程两边同时乘以0.1 0.5(1.2X+1)-0.2X=0.1 两边在同时乘以10 5(1.2X+1)-2X=1 6X+5-2X=1 4X=-4 X=-1

1、2÷XXX=48XX

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