Ответ: a) x = 4; б) x = 15; в) x = 22; г) x = 8
1. a) 4x = 16
\[\frac{4x}{4} = \frac{16}{4}\]
\[x = 4\]
Ответ: x = 4
б) -15 - 3x = -7x + 45
\[-3x + 7x = 45 + 15\]
\[4x = 60\]
\[\frac{4x}{4} = \frac{60}{4}\]
\[x = 15\]
Ответ: x = 15
в) 11 + 3x = 55 + x
\[3x - x = 55 - 11\]
\[2x = 44\]
\[\frac{2x}{2} = \frac{44}{2}\]
\[x = 22\]
Ответ: x = 22
г) -3x - 17 = 8x - 105
\[-3x - 8x = -105 + 17\]
\[-11x = -88\]
\[\frac{-11x}{-11} = \frac{-88}{-11}\]
\[x = 8\]
Ответ: x = 8
Ответ: a) x = 4; б) x = 15; в) x = 22; г) x = 8