Question

Determine by substitution if -3 is the root of x + 12= 9

Answer 1

Answer:

Step-by-step explanation:

In this question we simply have to put -3 in place of x i.e substitute the value of x as -3 for finding whether -3 is the root or not.

Here,RHS=9.........(1)

LHS=x+12

LHS=-3+12

LHS=9....................(2)

Thus, LHS=RHS from (1) and (2)

Therefore,-3 is the root of the equation x+12=9.

Hope you understand this answer.... :-)