Answer:
the baseball cards are used as currency in this example
n= 36
Step-by-step explanation:
18=n-18 (add 18 to both sides of the equation, 18 and -18 cancel out)
36=n
1200
3/4 of 200 = 150
150 is 1/8 of 1200
1 kg = 1000 g
so answer is 1000
68⁰
90 + 22 = 112
180 - 112 = 68