问题 解答题
4x+x=19.526.4-3x=15.37x=98
x-3×4=125x-x+14=182x-0.5×2=0.8.
答案

(1)4x+x=19.5,

5x=19.5,

5x÷5=19.5÷5,

x=3.9,

(2)26.4-3x=15.3,

26.4-3x+3x=15.3+3x,

3x+15.3=26.4,

3x+15.3-15.3=26.4-15.3,

3x=11.1,

3x÷3=11.1÷3

x=3.7,

(3)7x=98,

7x÷7=98÷7,

x=14,

(4)x-3×4=12,

x-12=12,

x-12+12=12+12,

x=24,

(5)5x-x+14=18,

4x+14=18,

4x+14-14=18-14,

4x=4,

4x÷4=4÷4,

x=1,

(6)2x-0.5×2=0.8

2x-1=0.8,

2x-1+1=0.8+1,

2x=1.8,

2x÷2=1.8÷2,

x=0.9.

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