问题
解答题
解方程或解比例: (1)12.8+4x=48 (2)
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答案
(1)12.8+4x=48,
12.8+4x-12.8=48-12.8,
4x=35.2,
4x÷4=35.2÷4,
x=8.8;
(2)
:2.5=6:x,3 5
0.6x=2.5×6,
0.6x=15,
0.6x÷0.6=15÷0.6,
x=25.
解方程或解比例: (1)12.8+4x=48 (2)
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(1)12.8+4x=48,
12.8+4x-12.8=48-12.8,
4x=35.2,
4x÷4=35.2÷4,
x=8.8;
(2)
:2.5=6:x,3 5
0.6x=2.5×6,
0.6x=15,
0.6x÷0.6=15÷0.6,
x=25.