упростите
[tex]| 1)4(3a + 1.6) - (5 + 2a) - 3(a - 1.2) \\ 2) - 1.5(6 - x) - 2( - x - 3) + 0.9(5x - 1) \\ 3)0.8(2y - 3) + 5(1.6 - 0.5y) - 2(0.8y - 1.7) \\4) \frac{5}{6} ( \frac{1}{5} n + 6) - \frac{2}{3} (9 - \frac{1}{2}n) + \frac{5}{8}( \frac{4}{5} n - 8)[/tex]

1) 12a+6.4a-5-2a-3a+3.6=13.4a-1.42) -9+x+2x+6+4x-0.9=7x-3.93) 1.6y- 2.4+8-2.5y-1.6y+3.4=-2.5y+104)1/6n+5-6+1/3n+1/2n-8=1/6n-1+2/6n+3/6n-8=1n-7