Question

find value of a whenx=-4andy=7in 3y=ax-9

Answer 1

3*7=a*-4-9
21=-4a -9
21+9=4a
30/4=a
7.5=a
pls mark as brainliest

Answer 2

$\huge \: hi \: mate \\ \\ 3y = ax - 9 \\ x = - 4 \: \: \: y = 7 \\ 3(7) = a( - 4) - 9 \\ 21 = - 4a - 9 \\ a = 21 + 9 \div - 4 \\ a = 30 \div 4 \\ a = 15 \div 2 \\ \\ hope \: it \: helped \: u \\ plz \: mark \: me \: as \: brainlist$