Answer:
x = 3
y = 2
Explanation:
x + 2y = 7 and
13 - 5y = x
transfer x to the left side and 13 to the right side of the equation for the second equation:
-x - 5y = -13 now find the sum of both equations:
x + 2y - x - 5y = 7 - 13 add/subtract like terms
-3y = -6 divide both sides by -3
y = 2
To find the value of x replace y with 2:
x + 2*2 = 7
x + 4 = 7 subtract 4 from both sides
x = 3