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(1)x÷60=14(2)78x−13=0.85(3)(1+25)x=24(4)70-4.8x=0.4(5)33-70x=5(6)x+x7=16.
题目详情
(1)x÷60=14
(2)
x−13=0.85
(3)(1+25)x=24
(4)70-4.8x=0.4
(5)33-70x=5
(6)x+
=16.
(2)
7 |
8 |
(3)(1+25)x=24
(4)70-4.8x=0.4
(5)33-70x=5
(6)x+
x |
7 |
▼优质解答
答案和解析
(1)x÷60=14,
x÷60×60=14×60,
x=840;
(2)
x-13=0.85,
x-13+13=0.85+13,
x=13.85,
x÷
=13.85÷
,
x=
;
(3)(1+25)x=24,
26x=24,
26x÷26=24÷26,
x=
;
(4)70-4.8x=0.4,
70-4.8x+4.8x=0.4+4.8x,
4.8x+0.4=70,
4.8x+0.4-0.4=70-0.4,
4.8x=69.6,
4.8x÷4.8=69.6÷4.8,
x=14.5;
(5)33-70x=5,
33-70x70x=5+70x,
70x+5=33,
70x+5-5=33-5,
70x=28,
70x÷70=28÷70,
x=0.4;
(6)x+
=16,
x=16,
x÷
=16÷
,
x=14.
(1)x÷60=14,
x÷60×60=14×60,
x=840;
(2)
7 |
8 |
7 |
8 |
7 |
8 |
7 |
8 |
7 |
8 |
7 |
8 |
x=
554 |
35 |
(3)(1+25)x=24,
26x=24,
26x÷26=24÷26,
x=
12 |
13 |
(4)70-4.8x=0.4,
70-4.8x+4.8x=0.4+4.8x,
4.8x+0.4=70,
4.8x+0.4-0.4=70-0.4,
4.8x=69.6,
4.8x÷4.8=69.6÷4.8,
x=14.5;
(5)33-70x=5,
33-70x70x=5+70x,
70x+5=33,
70x+5-5=33-5,
70x=28,
70x÷70=28÷70,
x=0.4;
(6)x+
x |
7 |
8 |
7 |
8 |
7 |
8 |
7 |
8 |
7 |
x=14.
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