Question

2+5. (-3)-(-4)=

(7-4)+(4-7)=

Answer 1

a)
= 2 + 5.( - 3) - ( - 4)
= 2 - 15 + 4
= - 13 + 4
= - 9

b)
= (7 - 4) + (4 - 7)
= 3 + (- 3)
= 3 - 3
= 0