Question

a : 15 = 54 : (6 × 3)
55 × x + 710 = 820
300 - x = 42 × 2 + 50

Answer 1

Ответ:

a : 15 = 54 : (6 x 3)

a : 15 = 3

a = 15 x 3

a = 45

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45 : 15 = 54 : (6 x 3)

3=3

55 × X + 710 = 820

X + 710 = 820

820 - 710 = 110

X = 110 : 55

X = 2

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55 × 2 + 710 = 820

820=820

300 - x = 42 × 2 + 50

300 - X = 134

X = 300 - 134

X = 166

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300 - 166 = 42 × 2 + 50

134=134