Question

7 (4-x)=84

74-x)7=84/7
4-x-12
4-x-4=-12-4
-x=-16
-x/=1=-16/-1
=16
Answer Is=16 How do I Check my answer??

Answer 1

x = - 8

Explanation:

7(4 - x) = 84 ( divide both sides by 7 )

4 - x = 12 ( subtract 4 from both sides )

- x = 8 ( multiply both sides by - 1 )

x = - 8

As a check

substitute x = - 8 into the left side of the equation and if equal to the right side then it is the solution.

7(4 - (- 8) )

= 7(4 + 8)

= 7(12)

= 84 = right side

Then x = - 8 is the solution to the equation