ha dois números em que a mitade do quadrado é igual a 7 vezes o número m menos 20 quais números são esses​

I’m really confused and need your assist me with this question i’ve never been taught

Arestaurant added a new outdoor section that was 8 feet wide and 6 feet long. what is the area of their new outdoor section

Long division setup showing an incomplete calculation. 12 is in the divisor, 6839 is in the dividend, and 5 hundreds and 6 tens is written in the quotient. 6000 is subtracted from 6839 to give 839. an unknown value represented by a box is being subtracted from 839. what number should be placed in the box to complete the division calculation?