I guess this is the answer

then:

x=9
Answer:

Step-by-step explanation:
To solve any equation we use PEDMAS rule(this is the sequence of priorities) where:
P: Parentheses
E: Exponent
D: Division
M: Multiplication
A: Addition
S: Subtraction
In the expression
,there is only one operation is used that is multiplication.

Answer: Area = 2.1 
Step-by-step explanation:
Area of rectangle = Length*width
A = 28 so 28 = 4 * height
height = 28/4 = 7
Answer:
It is 
Step-by-step explanation:
the four is multiplied 5 times