问题 解答题
解方程.
x-2.6=4.7
x÷18=3.62x+3.4=9.6
3x-6×12=246.8x-0.8x=0.485(16-x)=35.
答案

(1)x-2.6=4.7

x-2.6+2.6=4.7+2.6

x=7.3;

(2)x÷18=3.6

x÷18×18=3.6×18

x=64.8;

(3)2x+3.4=9.6

2x+3.4-3.4=9.6-3.4

2x÷2=6.2÷2

x=3.1;

(4)3x-6×12=24

3x-72+72=24+72

3x÷3=96÷3

x=32;

(5)6.8x-0.8x=0.48

6x=0.48

6x÷6=0.48÷6

x=0.08;

(6)5(16-x)=35

5(16-x)÷5=35÷5

16-x+x=7+x

16-7=7+x-7

x=9.

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