Question

Verify the following:
(i) -12/5 + 2/7 = 2/7 + -12/7
(ii) -5/8 + -9/13 = -9/13 + -5 /8

Answer 1

Answer:

simply solve it :-

Step-by-step explanation:

-12/5+2/7

=the lcm of 5 & 7 is 35.

=-12+2/35 (-,+= -)

=12-2/35

=10/35

Hence, prooved that 2/7+(-12/7)

ii)= -5/8 + -9/13

=the LCM of 8 and 13 is 104.

=-5+-9/104(-,-=+)

=5+9/35

=14/35

Hence, prooved that -9/13+(-5/8).

Answer 2

(i)

-12/5 + 2/7 = A

LCD (-12/5, 2/7) = 35

(12/5 x 7/7) + (2/7 x 5/5) =  -84/35 + 10/35

= (-84 + 10) / 35 = -74/35

2/7 + -12/7 = B

= (2 + (-12)) / 7 = -10/7

So A is not equal to B