2x + 2 [(5-x) + 2x] = 2 (5 + 2x)

Question

2x + 2 [(5-x) + 2x] = 2 (5 + 2x)

Answer 1

2x + 2 [(5-x) + 2x] = 2 (5 + 2x)


= 2x + 2 [5-x + 2x] = 2 (5 + 2x)


= 2x + 2 [x + 5] = 10 + 4x


= 2x + 2x + 10 = 10 + 4x


= 4x ​​+ 10 = 10 + 4x


=> 0 = 0

Answer 2

В приложении...........................

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