解方程:19-12%x=7计算:1、5/12x4/7x48x282、102x12/253、36x3/4+3/4x63+3/44、20-35x(2/5-1/7)
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![解方程:19-12%x=7计算:1、5/12x4/7x48x282、102x12/253、36x3/4+3/4x63+3/44、20-35x(2/5-1/7)](/uploads/image/z/663970-58-0.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B%EF%BC%9A19-12%EF%BC%85x%3D7%E8%AE%A1%E7%AE%97%EF%BC%9A1%E3%80%815%2F12x4%2F7x48x282%E3%80%81102x12%2F253%E3%80%8136x3%2F4%2B3%2F4x63%2B3%2F44%E3%80%8120-35x%EF%BC%882%2F5-1%2F7%EF%BC%89)
解方程:19-12%x=7计算:1、5/12x4/7x48x282、102x12/253、36x3/4+3/4x63+3/44、20-35x(2/5-1/7)
解方程:19-12%x=7
计算:1、5/12x4/7x48x28
2、102x12/25
3、36x3/4+3/4x63+3/4
4、20-35x(2/5-1/7)
解方程:19-12%x=7计算:1、5/12x4/7x48x282、102x12/253、36x3/4+3/4x63+3/44、20-35x(2/5-1/7)
23/4x40%+0.4x4.25
=5.75x0.4+0.4x4.25
=0.4x(5.75+4.25)
=0.4x10
=4
2*(x-0.7)=4.8
x-0.7=2.4
x=3.1
1/8*(x+0.5)=75%
x+0.5=600%
x+0.5=6
x=5.5
19-12%x=7
12%x=12
x=100
5/12x4/7x48x28
=(5/12x48) x (4/7x28)
=20x16
=320
102x12/25
=(100+2)x12/25
=100x12/25+2x12/25
=48+24/25
= 48.96
36x3/4+3/4x63+3/4
=3/4x(36+63+1)
=3/4x100
=75
20-35x(2/5-1/7)
=20-(35x2/5-35x1/7)
=20-14+5
=11
有问题请新开,我们打字也很辛苦.
1.23/4*2/5+2/5*17/4
=2/5(23/4+17/4)
=2/5*10
=4
2.2x-1.4=4.8
2x=6.2
x=3.1
3.x/8+1/8*1/2=3/4
x/8=3/4-1/16
x/8=11/16
x=11/2
原式=5.75×0.4+0.4×4.25 =0.4×(5.75+4.25) =0.4×10 =4 2x-1.4=4.8 2x=6.2 x=3.1 x+0.5=6 x=5.5