с + 10= 90; а-5 =45; 40+у =80; 24 – а =12; а+15 = 100; х- 10= 10; 30+с=70; 40 – х = 30; у + 8 =12; b – 9=9; 6+ а =14; с -7 =13; 120 – у =20; b+ 25 = 100; m – 78=0
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