Question

the sum of number x and 4 is 9​

Answer 1

x+4=9

=>x=9-4

=>x=5

Hope it helps !!

Answer 2

Step-by-step explanation:

Here' x + 4 =9

Then x = 9-4

X = 5 X+4 = 9 + 4 = 9 9 = 9

LHS = RHS

Hence proved!