Rozwiąż równania i sprawdź:
A) 15:a=3/2 B) 2/5a-16=24 C) 7a=3-1 i 5/6
2/5a-16=24
2/5a=24+16
2/5a=40:2/5
a=40*5/2
a=200/2
a=100
spr
2/5*100-16=24
200/5-16=24
40-16=24
7a=3-1 5/6
7a=3-11/6
7a=18/6-11/6
7a=7/6:7
a=7/6*1/7
a=7/42
a=1/6
7*1/6=7/6
7/6=7/6
15:a=3/2
15*2=3a
3a=30:3
a=10
15:10=3/2(1 1/2)
1 1/2=1 1/2
a)
15:a = 3/2 /*a
3/2a=15 /*2/3
a=30/3
spr:
15:10=3/2
3/2=3/2
b)
2/5a -16 = 24
2/5a= 24+16
2/5a=40 /*5/2
2/5 * 100 -16 = 24
24=24
c)7a =3 -1 5/6
7a= 2 6/6 -1 5/6
7a= 1 1/6
7a=7/6 /*1/7
7*1/6 = 3 - 1 5/6
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2/5a-16=24
2/5a=24+16
2/5a=40:2/5
a=40*5/2
a=200/2
a=100
spr
2/5*100-16=24
200/5-16=24
40-16=24
7a=3-1 5/6
7a=3-11/6
7a=18/6-11/6
7a=7/6:7
a=7/6*1/7
a=7/42
a=1/6
spr
7*1/6=7/6
7/6=7/6
15:a=3/2
15*2=3a
3a=30:3
a=10
spr
15:10=3/2(1 1/2)
1 1/2=1 1/2
a)
15:a = 3/2 /*a
3/2a=15 /*2/3
a=30/3
a=10
spr:
15:10=3/2
3/2=3/2
b)
2/5a -16 = 24
2/5a= 24+16
2/5a=40 /*5/2
a=100
spr:
2/5 * 100 -16 = 24
40-16=24
24=24
c)7a =3 -1 5/6
7a= 2 6/6 -1 5/6
7a= 1 1/6
7a=7/6 /*1/7
a=1/6
spr:
7*1/6 = 3 - 1 5/6
7/6=7/6