WODB?  Which One Doesn’t Belong?  see the italicized word not

study the top and bottom equations in each answer choice and compare to the original

(1)  top equation exactly same as given
bottom is equivalent to the given…just all the signs are changed

(2) top equation exactly same as given
bottom all terms are doubled

(3) top all terms are tripled
bottom is the second line of answer (1) tripled or the original second line multiplied by -3

(4) is the odd one out
top is doubled
bottom: the left side is x 4 but the right side has not changed