Answer 1

Transposing 9 to RHS

2y = 4 – 9

2y = – 5

Dividing both sides by 2,

y = `(- 5)/2`.

 

To check the answer:

LHS = `2((-5)/2) + 9 = - 5 + 9 = 4 = "RHS"`         ....(As required)