问题
解答题
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答案
(1)(x-4.5)×6=12.5,
6x-4.5×6=12.5,
6x-27=12.5,
6x-27+27=12.5+27,
6x=39.5,
6x÷6=39.5÷6,
x=6
;7 12
(2)27-17x=13.4,
27-17x+17x=13.4+17x,
13.4+17x=27,
13.4+17x-13.4=27-13.4,
17x=13.6,
17x÷17=13.6÷17,
x=0.8;
(3)9.6+3x=3.24×5,
9.6+3x-9.6=16.2-9.6,
3x=6.6,
3x÷3=6.6÷3,
x=2.2.