Question

решить уравнения 300-x*5=200 . (300-x)*5=210. (150-20)/x=65. (x+4)*7=350

Answer 1

300-х*5=200

х*5=300-200

х*5=100

х=100:5

х=20

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(300-х)*5=210

300-х=210:5

300-х=42

х=300-42

х=258

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(150-20):х=65

130:х=65

х=130:65

х=2

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(х+4)*7=350

х+4=350:7

х+4=50

х=50-4

х=46

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