Question

if x = -2, Y = 6 is a solution of the equation 3ax + 2ay = 6 then find value of b from 2(a-1)+2(3b-4)=4.

Answer 1

3 × a ×(-2) + 2 × a × 5 =6
-6a +12a = 6
6a = 6 
a= 1
2(1-1) + 2(3b - 4) = 4
0 + 6b - 8 =4
6b=4+8
6b=12
b=2

hope it helps!