(1)12-x=1.75 (2)1.44x=0.4 (3)x÷0.81=6.3 (4)
1个回答
(1)12-x=1.75
x=10.25
(2)1.44x=0.4
x=3.6
(3)x÷0.81=6.3
x=5.103
(4)
x=
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