Question

Enter the number that belongs in

the green box.
6x-7 X 4x + 7
20x + 5
x = [ ? ]

Answer 1

The solution is
`x = 7`,

Explanation:

Equation:

`6x - 7 + 20x + 5 = 180\textdegree`

-Combine like terms:

`6x - 7 + 20x + 5 = 180\textdegree`

`26x - 2 = 180\textdegree`

Add both sides by 2:

`26x - 2 + 2 = 180\textdegree + 2`

`26x = 182\textdegree`

-Divide both sides by 26:

`(26x)/(26) = (182\textdegree)/(26)`

`x = 7`

So, the answer is
`x = 7`.