Question

упростите выражение 6a-116a-8+4a-716a-8+ -2a-2 8-16a

Answer 1

$frac{6a-1}{16a-8}+frac{4a-7}{16a-8}+frac{-2a-2}{8-16a}=frac{6a-1}{16a-8}+frac{4a-7}{16a-8}+frac{2a+2}{16a-8}=frac{6a-1+4a-7+2a+2}{16a-8}=frac{12a-6}{16a-8}=frac{6(2a-1)}{8(2a-1)}=frac{3}{4}$

Answer 2

$frac{6a - 1}{8(2a - 1)} + frac{4a - 7}{8(2a - 1)} + frac{2( - a - 1)}{2(4 - 8a)} = \ \ = frac{6a - 1}{8(2a - 1)} + frac{4a - 7}{8(2a - 1)} + frac{ - a - 1}{2(2 - 4a)} = \ \ = frac{6a - 1}{8(2a - 1)} + frac{4a - 7}{8(2a - 1)} + frac{ - a - 1}{2 times 2(1 - 2a)} = \ \ = frac{6a - 1 }{8(2a - 1)} + frac{4a - 7}{8(2a - 1)} - frac{ - a - 1}{4(2a - 1)} = \ \ = frac{6a - 1 + 4a - 7 - 2( - a - 1)}{8(2a - 1)} = \ \ = frac{6a - 1 + 4a - 7 + 2a + 2}{8(2 - 1)} = \ \ = frac{12a -6 }{8(2a - 1)} = \ \ = frac{6(2a - 1)}{8(2a - 1)} = \ \ = frac{3}{4} = 0.75$