I’m not sure how to solve this linear application

Question

The sum of two integers is -61. One integer is 35 more than the other. Find the integers

Answer 1

x+y = -61

x = y + 35

y + 35 + y = -61

2y + 35 = -61

2y = -61 - 35

2y = -96

y = -48

x = -13