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2/5a=24+16
2/5a=40 /*5/2
a=100
spr:
2/5*100 - 16=24
40-16=24
24=24
7a=3-1 5/6
7a=18/6 - 11/6
7a=7/6 /*1/7
a=1/6
spr:
7* 1/6=18/6 - 11/6
7/6=7/6
2/5a=24+16
2/5a=40 /:2/5
a=40:2/5
a=40/1*5/2
a=200/2
a=100
7a=3-1 5/6
7a=18/6 - 11/6
7a=7/6 /*1/7
a=1/6
⅖a=40 /*5
2a=200/÷2
a=100
spr. ⅖*100-16=24
40-16=24
24=24
a to b.) nie jestem pewna...
7a=3-1⅚
7a=1⅙ /*6
42a=7 /÷42
a=⅙
spr. 7*⅙=3-1⅚
1⅙=1⅙
Proszę.