answersLogoWhite

0

x + y = 12

Since y=3x, we can stick '3x' in wherever we see 'y':

x + 3x = 12

Tidy up the left side:

4x = 12

Divide each side by 4:

x = 3

y = 9

User Avatar

Wiki User

14y ago

What else can I help you with?