What is the value of x in the equation 3x – y = 18, when y = 27?
5
7
45
63

x=15

Step-by-step explanation:

Given: The equation, 3x – y = 18

We need to find the value of x at y=27

So, we put y=27 into the equation and solve for x

3x - 27 = 18

Add 27 both sides (Addition property of equality)

3x -27 + 27 = 27 + 18

              3x = 45

Divide both sides by 3 (Division property of equality)

                x = 15

Hence, The value of x is 15

h

step-by-step explanation:

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.