Respuesta :

samuelthankgod

Step-by-step explanation:

3) y=4x-2

since x is already 3, simply substitute

y= 4(3)-2

y=12-2

y=10

second pair for number 3 is 10

4) y=16+7x

since y is already 37, simply substitute

37=16+7x

37-16=7x

21=7x

x=21/7

x=3

second pair for number 4 is 3