Subtract 10x
10x + y = -19
10x + 3y = -17
You would get:
-2y = -2
Two negatives make a positive number! Divide
y = 1
Plug in
10x + (1) = -19
10x = -20
Divide
x = -2
Your solutions are
x = -2
y = 1
Answer:
6 pounds
Step-by-step explanation:
if you lose 6 pounds and gain 6 pounds that make it a net change of 0 pounds
