Answer:
x=20
Step-by-step explanation:
3x-10=x+30
2x-10=30
2x=40
x=20
Answer:
8
Step-by-step explanation:
12-4=8
Answer:

Step-by-step explanation:



Answer:
Step-by-step explanation:
It's not c or d. It's not much but I hope it helps.
The correct answer is 20.
square root 2 times square root of 200 = square root of 400 ans since 400 is a perfect square, then I'll calculate to 20.