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3.2+5.42.3x=2.85方程

解:3.2+5.4-2.3x=2.85 8.6-2.3x=2.85 -2.3x=-5.75 ...

x=1 x=3 x=19 x=0.6 x=8 x=3.51

(1)x÷6.5=3.2, x÷6.5×6.5=3.2×6.5, x...

x+0.7=23 x=2.3-0.7 x=1.6 x-5.4=1.8 x=5.4+1.8 x=7....

5.4 ÷ X=1.8 X=5.4 ÷1.8 X=3

3.4+2(x-4)=5.4 解:2(x-4)=5.4-3.4 2(x-4)=2 x-4=2÷...

(1)1.5+x=12.9 1.5+x-1.5=12.9-1.5 x=1...

(1)5.4x+6.6x=19.2 12x=19.2 1...

(1)x+5.4=9.6 x+5.4-5.4=9.6-5.4 x=4.2...

0.8÷x=5.4÷3=1.8 1.8x=0.8 x=4/9

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