X+54=61 x-39=42 буду благадарна

Question

X+54=61 x-39=42 буду благадарна

Answer 1

Х+54=61
х=61-54
х=7

х-39=42
х=39+42
х=81

Answer 2

Х=61-54=7
х=42+39=81
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