问题
解答题
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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.