Question

Ето 2 часть за ету даю 51 балл

Answer 1

A). 8(6x - 7) - 17x = 48x - 56 - 17х = 31х - 56
Б). 9у - 5(17 - у) = 9у - 85 + 5у = 14у - 85
B). 2,5(4a - 8b) - 1,4(3a - 4b) = 10а - 20b - 4,2a + 5,6b = 5,8a - 14,4b
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A). 2,3 • (-8) - 9,8: (6,7 - 8,1) = -18, 4 - 49/5 + (-7/5) -18,4 + 49/5 • 5/7 = -18,4 + 7 = -11,4
b).4/7 : (-5 5/6) -5/62 :(-4 3/7) = 4/7 • (-35/6) - 5/62 • (-31/7) = -2•5/3+5/2•1/7 = -10/3 + 5/14 = -125/42 = -2 41/42