\({3 \over 5a}+{4 \over 5a}={7 \over 5a}\)

\({6 \over x}-{7 \over 8x}={48 \over 8x}-{7 \over 8x}={41 \over 8x}\)

\({4 \over 9a}-{7 \over 6b}={8b \over 18ab}-{21a \over 18ab}={8b-21a \over 18ab}\)

\(2-{9 \over 8p}={2 \over 1}-{9 \over 8p}={16p \over 8p}-{9 \over 8p}={16p-9 \over 8p}\)

\({5x \over y}-{9 \over 6y}={30x \over 6y}-{9 \over 6y}={30x-9 \over 6y}={10x-3 \over 2y}\)

\({2x \over x}={2 \over 1}=2\)

\({a \over 2a}={1 \over 2}\)

\({-4p \over -14p}=\frac{2}{7}\)

\({-25a \over -5a}=5\)

\({20xy \over -35xz}=-{4y \over 7z}\)

\({-28b \over -32ab}={7 \over 8a}\)

\({-32xyz \over 4yz}=-8x\)

\({4xy \over y}+{5xz \over z}=4x+5x=9x\)

\(5x-{3 \over 4x}={5x \over 1}⋅{4x \over 4x}-{3 \over 4x}={20x^2 \over 4x}-{3 \over 4x}={20x^2-3 \over 4x}\)

\({9q \over 8p}+{2p \over 3q}={27q^2 \over 24pq}+{16p^2 \over 24pq}={16p^2+27q^2 \over 24pq}\)

\({5 \over a}⋅-{3 \over b}=-{15 \over ab}\)

\({a \over 3}⋅{9 \over b}={9a \over 3b}={3a \over b}\)

\({9 \over 5}⋅x={9x \over 5}\)

\({7y \over x}⋅{x-5 \over 9}={7y(x-5) \over 9x}={7xy-35y \over 9x}\)

\({4 \over x}:{5 \over y}={4 \over x}⋅{y \over 5}={4y \over 5x}\)

\({7 \over 6}:a={7 \over 6}:{a \over 1}={7 \over 6}⋅{1 \over a}={7 \over 6a}\)

\({1 \over 5}:{a-2b \over b}={1 \over 5}⋅{b \over a-2b}={b \over 5(a-2b)}={b \over 5a-10b}\)

\({9p \over 7}+{p+8 \over 6}={54p \over 42}+{7(p+8) \over 42}={54p+7(p+8) \over 42}={61p+56 \over 42}\)