Question

What is the solution of the system?
y = 5x
x + y = 12

Answer 1

Explanation:

y=5x

+5(y)=(12-x)+5 which distributing is +5y= +60-5x

y=5x

+5y=+60-5x

6y=60

y=10

10=5x

x=2

Answer 2

x = 3

Explanation:

y = 5x

x + y = 12

x + 5x = 12 (substitute 5x in the place of y)

6x = 12

x = 12/6

x = 3