Question

7(3x-2x)=15(1-x)
решите пжжж​

Answer 1

7(3х - 2х) = 15(1 - х)

7 · 1х = 15 - 15х

7х + 15х = 15

22х = 15

х = 15/22

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Проверка:

7 · (3 · 15/22 - 2 · 15/22) = 15 · (1 - 15/22)

7 · (45/22 - 30/22) = 15 · 7/22

7 · 15/22 = 15 · 7/22

105/22 = 105/22 - верно