5114 Приведите подобные слагаемые: a) 7,3x + 4x; б) 3a – 5a; в) n – 4/5 n; г) -5/7 m + m; д) 2,1x + 4,5x – 1,9x; е) 4/7 a + 8/11 a – 4/11 a; ж) -6a – a + 7; з) 9n – 5y – 4n + 7y; и) 3,6x + 5,1y – 2,9x – 4,2y.

а)\(7.3x + 4x = (7.3 + 4)x = 11.3x\) б)\(3a - 5a = (3 - 5)a = -2a\) в)\(n - \frac{4}{5}n = (1 - \frac{4}{5})n = \frac{1}{5}n\) г)\(-\frac{5}{7}m + m = (1 - \frac{5}{7})m = \frac{2}{7}m\) д)\(2.1x + 4.5x - 1.9x = (2.1 + 4.5 - 1.9)x = 4.7x\) е)\(\frac{4}{7}a + \frac{8}{11}a - \frac{4}{11}a = (\frac{4}{7} + \frac{8}{11} - \frac{4}{11})a = (\frac{4}{7} + \frac{4}{11})a = (\frac{44 + 28}{77})a = \frac{72}{77}a\) ж)\(-6a - a + 7 = -7a + 7\) з)\(9n - 5y - 4n + 7y = (9n - 4n) + (-5y + 7y) = 5n + 2y\) и)\(3.6x + 5.1y - 2.9x - 4.2y = (3.6x - 2.9x) + (5.1y - 4.2y) = 0.7x + 0.9y\)