Question

can someone help with the 2nd one pls

Answer 1

HERE'S YOUR ANSWER

To Prove: - (-x) = x

x = -7/15 ...(1)(GIVEN)

-(-(-7/15) = -7/15 ( SUBSTITUTING EQ.1)

-7/15 = -7/15 ( - and - = +)

L.H.S = R.H.S

HENCE PROVED

Answer 2

this is your answer. i have explained it