5x + 9 = 5 + 3x

On transposing 3x to L.H.S and 9 to R.H.S, we obtain

5x − 3x = 5 − 9

2x = −4

On dividing both sides by 2, we obtain

x = −2

L.H.S = 5x + 9 = 5 × (−2) + 9 = −10 + 9 = −1

R.H.S = 5 + 3x = 5 + 3 × (−2) = 5 − 6 = −1

L.H.S. = R.H.S.

Hence, the result obtained above is correct.