1. Приведите подобные слагаемые: 1) 5a + 27a - a; 2) 12b - 17b - b; 5) 13a + 2b - 2a - b; 6) -5,1a - 4b - 4,9a + b; 8) 7,5x + y - 8,5x - 3,5y; 9) 8x - 6y - 7x - 2y; 11) 27p + 14q - 16p - 3q; 12) 1,6a + 4x - 2,8a - 7,5x.

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Accepted Answer

\( 5a + 27a - a = (5 + 27 - 1)a = 31a \)
\( 12b - 17b - b = (12 - 17 - 1)b = -6b \)
\( 13a + 2b - 2a - b = (13 - 2)a + (2 - 1)b = 11a + b \)
\( -5,1a - 4b - 4,9a + b = (-5,1 - 4,9)a + (-4 + 1)b = -10a - 3b \)
\( 7,5x + y - 8,5x - 3,5y = (7,5 - 8,5)x + (1 - 3,5)y = -x - 2,5y \)
\( 8x - 6y - 7x - 2y = (8 - 7)x + (-6 - 2)y = x - 8y \)
\( 27p + 14q - 16p - 3q = (27 - 16)p + (14 - 3)q = 11p + 11q \)
\( 1,6a + 4x - 2,8a - 7,5x = (1,6 - 2,8)a + (4 - 7,5)x = -1,2a - 3,5x \)

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