x + 7 = 2(3x - 4)         Remove the brackets
x + 7 = 2*3x - 4*2
x + 7 = 6x -  8            Subtract 7 from both sides.
x + 7 - 7 = 6x - 8 - 7   
x = 6x - 15                 Subtract 6x from both sides
x - 6x = - 15
-5x = - 15                   Divide by -5
-5x/-5 = -15/-5
x = 3
 
        
             
        
        
        
Answer:
14r−t+8w
Step-by-step explanation:
Let's simplify step-by-step.
8w+5r−t+9r
=8w+5r+−t+9r
Combine Like Terms:
=8w+5r+−t+9r
=(5r+9r)+(−t)+(8w)
=14r+−t+8w
Answer:
=14r−t+8w
 
        
             
        
        
        
Expanded FormExpanded form refers to a base and an exponent written as repeated multiplication. ExponentExponents are used to describe the number of times that a term is multiplied by itself. ExpressionAn expression is a mathematical phrase containing variables, operations and/or numbers.
        
             
        
        
        
Answer:

Step-by-step explanation:
Let  be the volumes of the smaller and bigger cylinder.
 be the volumes of the smaller and bigger cylinder.
The formula for the volume of a cylinder is given by :

As the two triangles are similar, the cube of their ratio would equal the ratio of their volume i.e.

So, the volume of the smaller cylinder is equal to  .
.
 
        
             
        
        
        
Y-4=(x+8) = add4 to both sides of the equation, so y= x+8+4 then add like terms. Y=x+12 final answer.