Answer :
Answer:
y = 31
Step-by-step explanation:
x + y = 10
Let x = -21
-21 + y = 10
Add 21 to each side
-21+21 +y = 10+21
y = 31
Answer:
y = 31
Step-by-step explanation:
x + y = 10
Let x = -21
-21 + y = 10
Add 21 to each side
-21+21 +y = 10+21
y = 31