$2.80 but if rounded to the nearest penny that would be $3.00. Hope this helps!
• Move x to the other side
7y=21-3x
• Divide by 7
y = (21-3x)/7
Answer:
310,000
Step-by-step explanation:
1 US dollar =1.31 Australian dollar
80 US dollar = x dollar
CrossMultiply
X = 140.8 dollar
