Multiple choice general knowledge math & puzzles Which one is incorrect? 3x(7x+12)=94 then x=2 10x+49-99=0 when x=5 5x(17x+13x)=600 when x=2 2x-7x = -125 when x=25 Reveal answer Fill a bubble to check yourself A Correct answer Explanation For the first option, if $x=2$, then $3x(7x+12) = 3(2)(7(2)+12) = 6(14+12) = 6(26) = 156$, not 94. Thus, this equation is incorrect, making it the correct choice.