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,
26.4-15.3=15.3+3x-15.3,
11.1÷3=3x÷3,
x=3.7;
(3)7x=98,
7x÷7=98÷7,
x=14;
(4)x-3×4=12,
x-12+12=12+12,
x=24;
(5)4x+14=18,
4x+14-14=18-14,
4x÷4=4÷4,
x=1;
(6)2x-0.5×2=0.8,
2x-1+1=0.8+1,
2x÷2=1.8÷2,
x=0.9.