The following expression is an example of which property of real numbers? (-2) + 7 = 7 + (-2) additive identity associative property commutative property multiplicative property

Pls i’m too dumb to know what i’m doing right now

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29

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?