Решите уравнения 7x+2x+3=30

Question

Решите уравнения 7x+2x+3=30

Comments

9x+3=30

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9x=30-3

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9x=27

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x=27:9

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x=3

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9•3+3=30

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30=30

Answer 1

9х+3=30
9х=30-3
9х=27
х=27:9
х=3

Answer 2

7x+2x+3=30
9x=27
x=27:9
x=3