Ответ:
а) 2Х + 2( Х + 1) = 42
2Х + 2Х + 2 = 42
4Х + 2 = 42
4Х = 42 -2
4Х = 40
Х = 40 ÷ 4
Х = 10
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Ответ:
а) 2Х + 2( Х + 1) = 42
2Х + 2Х + 2 = 42
4Х + 2 = 42
4Х = 42 -2
4Х = 40
Х = 40 ÷ 4
Х = 10