Question 137224
Wanda weighed her 4 pet pigs in pairs
:
Write an equation for each sentence
:
" Together, Oinker and Squeaker weighed 110 pounds,"
O + s = 110
or
O = (110-s)
:
" Squeaker and Curly weighed 103 pounds,"
s + c = 103
or
s = (103-c)
:
" and Curly and Porker totaled 108 pounds."
c + p = 108
or
p = (108-c) 
:
How many pounds would Oinker and Porker weigh together?
O = 110-s
Substitute (103-c) for s 
O = 110 - (103-c)
O = 110 - 103 + c
O = (7 + c)
:
Find the weight of O + P
:
Substitute (7+c) for O and (108-c) for p
O + p = (7+c) + (108-c)
O + p = 7 + 108 + c - c
O + p = 115 lbs