300–x*5=210 (300–x)*5=210 (150–20): x=65 (x+4)*7=350 - вопрос №743211530052103005210150206547350300181410560090 от простоквашино2345 05.06.2020 05:14

Question

Математика: 300–x*5=210 (300–x)*5=210 (150–20): x=65 (x+4)*7=350 (300–18)*x=1410 5*x–600=900

простоквашино2345 · Answer

Х*5 = 300 - 210 = 90х=90*5 = 18300-х = 210:5= 42х=300-42=258130:х=65х=130:65=2х+4=350:7=50х=50-4=46282*х=1410х=1410:282=55*х=600+900=1500х=1500:5=300...