Answer:
513.69
Step-by-step explanation:
^^^^
Subtract 748.25 by 234.56 and you get
Convert mixed number to improper fraction:

Answer:
n= 2/-7
Step-by-step explanation:
2/n = -7
Multiply by n: 2= -7n
Divide by -7: n= 2/-7, or n= -0.286
180-50=130
x-y=130
x+y=50
2x=180
x=90
90+y=50
y=50-90
y=-40