Question 48702
Solve by substitution.


x - y = 3
3x - 2y = 3


x - y = 3

=>x = 3 + y


3x - 2y = 3

=>3x = 3 + 2y
=>3 (3+y) = 3 + 2y
=>9 + 3y = 3 + 2y
=>3y - 2y = 3 - 9
=>y = -6


x - y = 3

=>x - (-6) = 3
=>x + 6 = 3
=>x = 3 - 6
=>x = -3