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1. 10q - 89
= 10(20) - 89
= 200 - 89
= 111
2.(125 - q) : 7
= (125 - 20 ) : 7
= 105 : 7
= 15
3. (11q : 4) + 25
= (11(20) : 4) + 25
= (220 : 4) + 25
= 55 + 25
= 80
4. (14q + 80) : 30
= (14(20) + 80) : 30
= (280 + 80) : 30
= 360 : 30
= 120
2. (125-20) : 7 = 105 : 7 = 15
3. (11.20 : 4) + 25 = (220 : 4) + 25 = 55 + 25 = 80
4. (14.20 + 80) : 30 = (280 + 80) : 30 = 360 : 30 = 12