Answer:
y = 9
x = 0
Step-by-step explanation:
5x + 2y = 18
-5x + 5y = 45 add two equations up
5x + 2y -5x + 5y = 18 + 45 add like terms (note that, 5x will eliminate -5x)
7y = 63 divide both sides by 7
y = 9 to find the value of x we can use this information
5x + 2y = 18 replace y with 9
5x + 2*9 = 18
5x + 18 = 18 subtract 18 from both sides
5x = 0 and x = 0
