I believe the answer is 3
Solve x by simplifying both sides of the equation & then isolating the variable x=-4 & the negative comes in from the -12
30%*470=141 (So the number of students in 8 grade is 141)
Here you go, hope it helped you out
Answer:
54
Step-by-step explanation:

Parentheses (14 + 42 - 6) = 50:
⇒ 50/10 + 7²
Exponents 7² = 49:
⇒ 50/10 + 49
Multiplication/division 50/10 = 5:
⇒ 5 + 49
Addition/subtraction: 5 + 49 = 54
⇒ 54