Answer:
x=3
Step-by-step explanation:
15x=27+6x
subtract 6x
9x=27
divide 9
x=3
Answer:
Franco has 66 baseball cards.
Step-by-step explanation:
This question can be solved by a system of equations.
I am going to say that:
x is the number of baseball cards that Franco has.
y is the number of baseball cards that Juan has.
Franco has 18 fewer baseball cards than Juan.
This means that:

Also:

Together they have 150 baseball cards.
This means that:

Since 




Franco has 66 baseball cards.
Answer:
Area of Square= 12*12= 144
Area of Circle= πr2
Radius= 12/2= 6
Area of Circle= 3.14*6*6 =113.04
Area of shaded region= 144- 113.04 = 30.96 = 31.0 (1 dp)