Question

find the value of a so that x=-1,y=3 is a solution of 5(x-a)+a(y+6)=7 is​

Answer 1

Answer:

a=6

Step-by-step explanation:

• 5(x-a) + a(y+6) =7
• 5x-5a+ay+6a=7
• 5x+ay = 7+5a-6a
• 5x+ay = 7-a

putting the given value of x and y

which is x= -1 and y=3

• 5(-1)+a(3) = 7-a
• -5+3a = 7-a
• 3a-a= 7+5
• 2a = 12
• a= 6