To solve the system of equations:

1) -1 + 3x + 3y = x + 49
2) 7 - 2x = x - 89

First, simplify equation 1:
3x + 3y = x + 50
2x + 3y = 50

Now, solve for y in terms of x:
3y = 50 - 2x
y = (50 - 2x) / 3

Next, substitute this expression for y into equation 2:
7 - 2x = x - 89

Now, solve for x:
7 + 89 = x - 2x
96 = -x
x = -96

Finally, substitute x = -96 back into the expression for y:
y = (50 - 2(-96)) / 3
y = (50 + 192) / 3
y = 242 / 3
y = 80.67

Therefore, the solution to the system of equations is x = -96 and y = 80.67.