Answer :
total goldfish = 36
orange goldfish= x = 7 more than twice the number of black goldfish
x = 2y + 7
Black goldfish = y
x + y = 36
x = 2y + 7
x-2y = 7
A.
x + y = 36
x - 2y = 7
total goldfish = 36
orange goldfish= x = 7 more than twice the number of black goldfish
x = 2y + 7
Black goldfish = y
x + y = 36
x = 2y + 7
x-2y = 7
A.
x + y = 36
x - 2y = 7