Question

verify -12/5+2/7=2/7+-12/5

Answer 1

$- 1.4 + 0.28 = 0.28 - 1.4 \\ - 1.12 = - 1.12$
hence they are verified.

Answer 2

LHS=-12/5+2/7

take LCM of 5 and 7 and lcm is 35
-84+10/35
-74/35
RHS=2/7-12/5
10-84/35
-74/35
hence proved