Answer:
A = 3 , B = 4
Explanation:
given (2, - 4 ) is a solution , then x = 2 and y = - 4 make the system true
substitute x = 2 , y = - 4 into the equations and solve for A and B
2A + 2(- 4) = - 2
2A - 8 = - 2 ( add 8 to both sides )
2A = 6 ( divide both sides by 2 )
A = 3
and
5(2) - B(- 4) = 26
10 + 4B = 26 ( subtract 10 from both sides )
4B = 16 ( divide both sides by 4 )
B = 4