Question

Find the value of x if the perimeter is 30. Х X +3 2x – 1

Answer 1

Answer:

x = 7

Step-by-step explanation:

The perimeter of triangle is A = a + b + C, the sum of the three sides.

P = 30 and the three sides are x + (2x - 1) + (x + 3)

30 = x + (2x - 1) + (x + 3)   combine like terms together

30 = (x + 2x + x) + (-1 + 3)    Add like terms  

30 = 4x + 2                    

30 - 2 = 4x              Subtract 2

28 = 4x                   Simply

7 = x                       Divide by 4      

Check x = 7;     x + 3 ;       2x - 1                        7 + 10 + 13 = 30

                     7 + 3 = 10     2(7) - 1

                                            14 - 1 = 13