What is the sum of -7+5 A1 -12 A2 -2 A3 -1 A4 1 A5 2 A6 12 plz help fast

A2 -2

Step-by-step explanation:

Given the mathematical expression;

-7 + 5

To find their sum;

Simplifying a mathematical expression simply means to collect like terms that are having the same variables or constants and combining them, so as to reduce the expression to the lowest possible value.

-7 + 5 = -2

Therefore, the sum of -7 + 5 is equal to -2

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -