Help me solve the following?

Answer:
[See Below]
Step-by-step explanation:
✦ Solve for [tex]10y+30=100[/tex].
✦ Subtract [tex]30[/tex] on each side:
✦ Divide [tex]10[/tex] on each side:
So the answer would be [tex]7[/tex].
~Hope this helps Mate. If you need anything feel free to message me.