Question

how to solve this sum 5{3-4} -8 {4+-5}

Answer 1

5{3-4} -8 {4+-5}=15-20-8{4-5}
=-5-32+40
=-5+8
=3

Answer 2

First solve the matter in the brackets...then do the further:
5×(3-4)-8×(4+-5)
5×(-1) = 5*-1=-5
-8*(-1) = -8*-1=8                        remember - × - = +
=-5+8 = 8-5=3 the answer...