if 2x+3=9,what is the value of 4x-3

Question

if 2x+3=9,what is the value of 4x-3

 

Answer 1

2x+3=9

2x+3=9

   -3=-3....add

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2x=6...divide both sides by 2 to get x

x=3

substitute the value of x=3 in equation

4(3)-3

12-3=9

4x-3=9

 

Answer 2

2x+3=9

subtract 3 from both sides

2x=6

divide both sides by 2

x=3

 

plug 3 in as x in the second equation

4(3)-3=9

Answer 3

You have to solve the first equation for x.

 

2x+3=9

2x=6

x=6

 

Then substitute it into the second equation.

 

4x-3

4(6)-3

24-3

21

 

ANSWER: 21