Ответ:
Пошаговое объяснение:
a) = (-4/9)a — (3/9)a + 2 = -(7/9)a + 2
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8,4*(x + 4,4) = 4,6*(3x + 5,1)
8,4x + 36,96 = 13,8x + 23,46
13,8x — 8,4x = 36,96 — 23,46
5,4x = 13,5
x = 13,5 : 5,4
x = 2,5
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(2/3)z = (2/9)z — 7/9 |*9
6z = 2z — 7
6z — 2z = -7
4z = -7
z = -7 : 4
z = -1,75