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a)0,4x = 82 | :0,4
x = 205
b)17:5x = 51 | :(17:5)
x = 15
c)4:5x = 2:3*24
4:5x = 16 | :4:5
x = 20
d)6:5x = 4:9(5:2 + 19:5)
6:5x = 4:9(25:10 + 38:10)
6:5x = 4:9(63:10)
6:5x = 28:10 | :(6:5)
x = 2⅓
2.
a) 9 = ¼ * 36
b)14:3 : 28:5 = 14:3 * 5:28 = 5:6
c)9:14 : 72:7 = 9:14 * 7:27 = ⅙
d)75:7 : 25 = 75:7 * 1:25 = 3:7
a) 205
b) 15
c) 20
d) 2.(3)
2.
a) ¹/₄
b) ⁵/₆
c) ¹/₆
d) ³/₇
a) 2/5 x= 82
x=82:2/5
x=82 *5/2
x=205
b) 3 2/5 x= 51
x=51:17/2
x=51* 2/17
x=6
c) 4/5x=2/3 * 24
4/5x=16
x=16*5/4
x=20
d) 1 1/5 x,=4/9 *( 2 1/2+ 3 4/5)
6/5 x =4/9 *( 2 5/10+ 3 8/10)
6/5 x =4/9 *(5 13/10)
6/5 x =4/9 *(6 3/10)
6/5 x =4/9 *( 63/10)
6/5 x =4 *(7/10)
6/5 x =28/10
x=28/10*5/6
x=8/3
x=2 2/3
2.Oblicz, jakim ułamkiem liczby:
a) 936 =1/4
b) 4 2/3 : 5 3/5 =14/3 : 28/5=14/3* 5/28 =5/6
c) 9/14:10 2/7 = 9/14:72/7 = 9/14*7 /72== 1/16
d) 25 : 10 5/7 =25:75/7=25*7/75=7/3=2 1/3