Mr. Pham wrote the equations below on the board 18 minus 7X equals -20.5 what is the value of X

5.5

Step-by-step explanation

18-7x= -20.5

-7x=-20.5-18

7x=38.5

x=38.5/7=5.5                                                                                                                                                                                                                                                                                                                                          

Answer

x = 5.5

Step-by-step explanation:

Set the equation up as 18 - 7x = -20.5

Subtract 18 from both sides of the equation. 18-18 cancels out leaving you with -7x. -20.5 - 18 = -38.5 .

The new equation is -7x = -38.5 .

Divide both sides by -7. -7 cancels out leaving you with x and -38.5/ -7 = 5.5 .

To check your answer plug 5.5 into the equation. 18 - 7(5.5)= -20.5 . 7(5.5) is  38.5 . 18 - 38.5 = -20.5