Question

Solve this system of equations using substitution. Put your answer in ordered pair form, (x, y).
a = 3b - 4
a + b =16

Answer 1

4b = 20
b= 5

therefore a = 11

Answer 2

3b-4+b=16
4b-4=16
4b=20
b=5
a=11

Answer 3

(a,b)=(11,5)