Determine whether (2, 3) is a solution of 7b-5a =30.

Question

Determine whether (2, 3) is a solution of 7b-5a =30. Unless stated otherwise, to determine whether an ordered pair is a solution first alphabetically. Use the second number in the ordered pair to replace th The variable a occurs first alphabetically amongst the variables in the g So substitute for a and for b in the equation 7b -5a =30

Answer 1

Determine whether (2, 3) is a solution of 7b-5a =30

 

a = 2, b = 3:  7(3) - 5(2) = 21 - 10 = 11 ... not a solution

 

a = 3, b = 2:  7(2) - 5(3) = 14 - 15 = -1 ... not a solution

 

Either way... (2,3) is not a solution of 7b-5a=30