ГДЗ по математике 5 класс Ерина рабочая тетрадь Часть 1, 2 Часть 1 | Страница 40

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\[\boxed{\mathbf{6.\ }}\]

\[\textbf{а)}\ 1)\ a + 46 = 184 - 77\]

\[a + 46 = 107\]

\[a = 61.\]

\[2)\ a + 46 + 77 = 184\]

\[a + 123 = 184\]

\[a = 61.\]

\[\textbf{б)}\ 1)\ 45 + x = 51 + 16\]

\[45 + x = 67\]

\[x = 22.\]

\[2)\ (45 - 16) + x = 51\]

\[29 + x = 51\]

\[x = 22.\]

\[\textbf{в)}\ 1)\ 42 - y = 104 - 86\]

\[42 - y = 18\]

\[y = 24.\]

\[2)\ (86 + 42) - y = 104\]

\[128 - y = 104\]

\[y = 24.\]

\[\boxed{\mathbf{7.\ }}\]

\[\textbf{а)}\ (a - 15) - 16 = 18\]

\[a - 15 = 18 + 16\]

\[a - 15 = 34\]

\[a = 49.\]

\[\textbf{б)}\ (x - 41) - 21 = 8\]

\[x - 41 = 8 + 21\]

\[x - 41 = 29\]

\[x = 70.\]

\[\textbf{в)}\ (136 - x) - 16 = 52\]

\[136 - x = 52 + 16\]

\[136 - x = 68\]

\[x = 68.\]

\[\textbf{г)}\ (558 + x) - 52 = 746\]

\[558 + x = 746 + 52\]

\[558 + x = 798\]

\[x = 240.\]

\[\textbf{д)}\ 419 - (y - 9) = 36\]

\[y - 9 = 419 - 36\]

\[y - 9 = 383\]

\[y = 392.\]

\[\textbf{е)}\ 92 - (17 - b) = 89\]

\[17 - b = 92 - 89\]

\[17 - b = 3\]

\[b = 14.\]

\[\textbf{а)}\ \ \ б)\ \ \ в)\ \ г)\ \ \ д)\ \ е)\]