\( 2 - 3(2x + 2) = 5 - 4x \)
\( 2 - 6x - 6 = 5 - 4x \)
\( -4 - 6x = 5 - 4x \)
\( -6x + 4x = 5 + 4 \)
\( -2x = 9 \)
\( x = -4.5 \)
\( \frac{5x + 4}{2} + 3 = \frac{9x}{4} \)
Умножим обе части на 4:
\( 2(5x + 4) + 12 = 9x \)
\( 10x + 8 + 12 = 9x \)
\( 10x + 20 = 9x \)
\( 10x - 9x = -20 \)
\( x = -20 \)
\( 3x + 5 + (x + 5) = (1 - x) + 4 \)
\( 3x + 5 + x + 5 = 1 - x + 4 \)
\( 4x + 10 = 5 - x \)
\( 4x + x = 5 - 10 \)
\( 5x = -5 \)
\( x = -1 \)
\( -9(8 - 9x) = 4x + 5 \)
\( -72 + 81x = 4x + 5 \)
\( 81x - 4x = 5 + 72 \)
\( 77x = 77 \)
\( x = 1 \)
\( 13 + \frac{x}{4} = x + 1 \)
Умножим обе части на 4:
\( 52 + x = 4x + 4 \)
\( 52 - 4 = 4x - x \)
\( 48 = 3x \)
\( x = 16 \)
Ответ: а) -4.5; б) -20; в) -1; г) 1; д) 16.