(3×Х+160)÷7=40 ; 90×(Х-8)+60=510; (15-Х)×50-36=314; (9×Х+37)÷8=8; 9×(56÷Х-5)=27; (78-Х×6)÷6=7; 35÷(15-Х÷8)=5; (150÷Х+6)÷7=8;
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