\( 4x - x = 24 \)
\( 3x = 24 \)
\( x = 8 \)
\( 8x + 6x = 20 + 8 \)
\( 14x = 28 \)
\( x = 2 \)
\( 9 + 40 = 3x + 4x \)
\( 49 = 7x \)
\( x = 7 \)
\( 0,6x + 0,8x = 5,8 + 5,4 \)
\( 1,4x = 11,2 \)
\( x = \frac{11,2}{1,4} = \frac{112}{14} = 8 \)
\( 4,7 + 3,3 = 0,5x + 1,1x \)
\( 8 = 1,6x \)
\( x = \frac{8}{1,6} = \frac{80}{16} = 5 \)
Ответ: а) 8; б) 2; в) 7; г) 8; д) 5.