(1)(160-x)X10=850-5x(2)x-40=5/4x+40
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(1)(160-x)X10=850-5x(2)x-40=5/4x+40
(1)(160-x)X10=850-5x
(2)x-40=5/4x+40
(1)(160-x)X10=850-5x(2)x-40=5/4x+40
(1)(160-x)X10=850-5x
1600-10x=850-5x
10x-5x=1600-850
5x=750
x=750÷5
x=150
(2)x-40=5/4x+40
5/4x-x=-40-40
1/4x=-80
x=80×4
x=320
1600-10x=850-5x
5x=750
x=150;
1/4x=-80
x=-320
1600-10x+5x=850 1600-850=5x x=150
x=1.25x+80 -0.25x=80 x=-320
(160-x)X10=850-5x
160*10-10x = 850-5x
1600-10x = 850-5x
1600-850 = 10x-5x
750 =5x
x =750 ÷5
x = 150
x-40=5/4x+40
这里应该是 (4x) / 5 吧,也就是 五分之四x ,
如果是,则有
x-40=4x/5 +...
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(160-x)X10=850-5x
160*10-10x = 850-5x
1600-10x = 850-5x
1600-850 = 10x-5x
750 =5x
x =750 ÷5
x = 150
x-40=5/4x+40
这里应该是 (4x) / 5 吧,也就是 五分之四x ,
如果是,则有
x-40=4x/5 +40
x-4x/5=40+40
x/5=80
x=400
如果是 (5x) /4,即四分之五x ,则有
x-40=5x/4+40
x-5x/4=40+40
-x/4=80
-x=320
x=-320
希望可以帮到你、
收起
(1)(160-x)*10=850-5x
1600-10x=850-5x
-10x+5x=850-1600
-5x=-750
x=150
(2)x-40=5/4x+40
x-5/4x=40+40
-1/4x=80
-x=80*4
x=-320
希望我没理解错
(1)160*10-10x=850-5x; 1600-850=10x-5x; 750=5x; x=150
(2)x-5/4x=40+40; -1/4x=80; x=-320
(1)(160-x)X10=850-5x
1600-10x=850-5x
-10x+5x=850-1600
-5x=-750
x=150
(sorry,第2题我没算出来)