Rozwiąż i sprawdz równania
a). 1/4 + x = 2,5
b). 13 1/3 - x = 4,8
c).2 1/3 * x = 5,6
d).7,8 : x = 1/4
e). x :5/6 = 9,5
F). 4 1/2 * X = 6,25
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a).
1/4 + x = 2,5
x=2,5-1/4
x=2,5-0,25
x=2,25
b).
13 1/3 - x = 4,8
-x=4,8-13 1/3
-x=4 4/5-13 1/3
-x=24/5-40/3
-x=72/15-200/15
-x=-128/15
x=128/15
x=8 8/15
c).
2 1/3 * x = 5,6
x=5,6:2 1/3
x=5 3/5:2 1/3
x=28/5:7/3
x=28/5*3/7
x=12/5
x=2 2/5
d).
7,8 : x = 1/4
x=7 4/5:1/4
x=39/5:1/4
x=39/5*4
x=156/5
x=31 1/5
e).
x :5/6 = 9,5
x=9,5*5/6
x=9 1/2*5/6
x=19/2*5/6
x=95/12
x=7 11/12
F).
4 1/2 * X = 6,25
x=6 1/4:4 1/2
x=25/4*2/9
x=225/2
x=112 1/2
a) 1/4 + x = 2,5
x = 2 2/4 - 1/4
x = 2 1/4
1/4 + 2 1/4 = 2,5
b) 13 1/3 - x =4,8
-x=4 4/5 - 13 1/3
-x = 4 12/15 - 13 5/15
-x = -9 7/15 | *(-1)
x = 9 7/15
13 1/3 - 9 7/15 = 4,8
c) 2 1/3 * x = 5,6| :2 1/3
x = 5 1/3 : 2 1/3
x = 16/3 * 3/7
x= 48/21 = 2 6/21
2 1/3* 2 6/21 = 5,6
d) 7,8 : x = 1,4
7,8/x =1,4 | *x
7,8 = 1,4x | :1,4
7,8 : 1,4 = x
x = 5,57
7,8 : 5,57 = 1,4
e) x : 5/6 = 9,5
x/ 5/6 = 9,5 | 5,6
x = 9,5 * 5/6
x= 95/10 * 5/6
x = 475/60 = 95/12
95/12 : 5/6 = 9,5
f) 4 1/2 * X = 6,25
4 2/4x = 6 1/4 | : 4 2/4
x = 6 1/4 : 4 2/4
x = 25/4 : 18/4
x= 25/4 * 4/18
x= 100/72= 50/36
4 1/2 * 50/36 = 6,25