Question

I need help with this one and can u explain it

Answer 1

x = 8

Explanation:

Vertically opposite angles are congruent.

5x + 9 = 57 - x

Add x to both sides,

5x +x + 9 = 57

6x + 9 = 57

Subtract 9 from both sides,

6x = 57 - 9

6x = 48

Divide both sides by 6,

x = 48 ÷ 6

x = 8