Question

ask your quest help me

Answer 1

cross multiply,
5×7y=12(3-6y)
35y=36-72y
35y+72y=36
107y=36
y=36/107

Answer 2

$1. \\ \frac{6m - 3}{2m} = - 3 \\ 6m - 3 = - 6m \\ 6m + 6m = 3 \\ 12m = 3 \\ m = \frac{3}{12} = \frac{1}{4} \\ 2. \\ \frac{7y}{3 - 6y} = \frac{12}{5} \\ 35y = 12(3 - 6y) \\ 35y = 36 - 72y \\ 35y + 72y = 36 \\ 107y = 36 \\ y = \frac{36}{107} \\ 3. \\ \frac{6t - 4}{3t + 2} = \frac{ - 7}{2} \\ 2(6t - 4) = - 7(3t + 2) \\ 12t - 8 = - 21t - 14 \\ 12t + 21t = - 14 + 8 \\ 33t = - 6 \\ t = \frac{ - 6}{33} = \frac{ - 2}{11} \\ 4. \\ \frac{3z - 7}{ - 2z + 9} = \frac{ - 6}{11} \\ 11(3z - 7) = - 6( - 2z + 9) \\ 33z - 77 = 12z - 54 \\ 33z - 12z = - 54 + 77 \\ 21z = 23 \\ z = \frac{23}{21} = 1 \frac{2}{21}$