Question

solve the following by trial and error method
12-x=7​

Answer 1

Answer:

Let the value of x be 1

LHS= 12-x= 12-1 = 11

RHS is not equal to LHS Hence this cannot be the value of x

Let the value of x be 2

LHS= 12-x= 12-2 = 10

RHS is not equal to LHS Hence this cannot be the value of x

Let the value of x be 3

LHS= 12-x= 12-3 = 9

RHS is not equal to LHS Hence this cannot be the value of x

Let the value of x be 4

LHS= 12-x= 12-4 = 8

RHS is not equal to LHS Hence this cannot be the value of x

Let the value of x be 5

LHS= 12-x= 12-5 = 7

RHS is equal to LHS Hence this is be the value of x