a) 10(12+3) = 1012 + 103 = 120 + 30 = 150б) (12+31)15 = 1215 + 3115 = 180 + 465 = 645в) (17+43)8 = 178 + 438 = 136 + 344 = 480г) (93+26)16 = 9316 + 2616 = 1488 + 416 = 1904д) 5(8+a) = 58 + 5a = 40 + 5a = 5a + 40е) 7(x+9) = 7x + 79 = 7x + 63ж) 12(a+b) = 12a + 12b = 12a + 12bз) (x+9)15 = 15x + 159 = 15x + 135и) a(x+y) = ax + a*y = ax + ay
a) 10(12+3) = 1012 + 103 = 120 + 30 = 150
б) (12+31)15 = 1215 + 3115 = 180 + 465 = 645
в) (17+43)8 = 178 + 438 = 136 + 344 = 480
г) (93+26)16 = 9316 + 2616 = 1488 + 416 = 1904
д) 5(8+a) = 58 + 5a = 40 + 5a = 5a + 40
е) 7(x+9) = 7x + 79 = 7x + 63
ж) 12(a+b) = 12a + 12b = 12a + 12b
з) (x+9)15 = 15x + 159 = 15x + 135
и) a(x+y) = ax + a*y = ax + ay