Question

Which operation should be used to solve x + 7 = 19?
÷ 7
– 7
x 7
+ 7

Answer 1

Question:

Which operation should be used to solve x + 7 = 19?

÷ 7

– 7

x 7

+ 7

Answer:

-7 is the correct answer.

Solution:

Because when we'll use -7 then the 7 in the LHS will get cancelled.

x + 7 = 19

or, x + 7 - 7 = 19 - 7

or, x = 12