Номер 1278

1) 3m – 6p + 9t = 3 • m – 3 • 2p + 3 • 3t = 3(m – 2p + 3t)

2) 5a + 5b – 5 = 5a + 5b – 5 • 1 = 5(a + b – 1) 

3) 10m + 15c – 25x = 5 • 2m + 5 • 3c – 5∙ 5x = 5(2m + 3c – 5x)

4) 8bx – 16by + 12b = 4b • 2x – 4b • 4y + 4b • 3 = 4b(2x – 4y + 3)

5) 21ab – 35ac – 7ad = 7a • 3b – 7a • 5c – 7a • d = 7a(3b – 5c – d)

6) 12ax + 18хm – 24bx = 6x • 2a + 6x • 3m – 6x • 4b = 6x(2a + 3m – 4b)