Answer:
The amount spent on radio is $8.5 billion
The amount spent on television is $37.5 billion
The amount spent on newspaper is $42.8 billion
Step-by-step explanation:
Let;
x represent the amount spent on radio ads
y represent the amount spent on television ads
z represent the amount spent on newspaper ads.
The total amount spent on ads
x + y + z = 88.8 ......1
The total amount spent on television and radio ads was only $3.2 billion more than the amount spent on newspaper ads alone.
x + y = 3.2 + z
x + y - z = 3.2 .....2
The amount spent on newspaper ads was $5.3 billion more than what was spent on television ads.
z = 5.3 + y
z - y = 5.3 ......3
Subtracting equation 2 from equation 1;
(x + y + z) - (x + y - z) = 88.8 -3.2
z + z = 85.6
2z = 85.6
z = 85.6/2
z = 42.8
We can now substitute the value of z into equation 3
42.8 - y = 5.3
y = 42.8 - 5.3
y = 37.5
Substituting y and z to equation 1, we have;
x + 37.5 + 42.8 = 88.8
x =88.8 - (37.5 + 42.8)
x = 8.5
Therefore;
The amount spent on radio is $8.5 billion
The amount spent on television is $37.5 billion
The amount spent on newspaper is $42.8 billion
