Let x represent the weight of Jessica’s dog
Let y represent the weight of Emma’s dog
The dogs weigh 38 pounds altogether.It means that
x + y = 38
Emma’s dog weighs 10 pounds more than Jessica’s dog. It means that
y = x + 10
Substituting y = x + 10 into the first equation, then
x + x + 10 = 38
2x + 10 = 38
The equation that can be used to find the weight of Jessica’s dog is
2x + 10 = 38