Pensé un número lo dividido entre -3 y el resultado le resta -8 y obtuve siete qué número pensé

Find a number such that if you add 8 and divide the result by 4 you will get the same answer as if you subtracted 3 from the original number and divided by 2

What is [tex] {7}^{98 + \sqrt{4} } - 3 \times (64 \div 2 + 4 - 36) \times a = a + 36[/tex]?

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16