Answer:
X = 20
Step-by-step explanation:
when you have an angle that looks like an X shape the angles opposite each other are always equal. knowing this we now know that angle 5x must equal 100
so just make X the subject of the formula and solve, like shown bellow
[tex]5x = 100[/tex]
[tex]x = 100 \div 5[/tex]
[tex]x = 20[/tex]
