Answer:
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
