I- huh I don’t understand the question
X= 10
Hope this helps and good luckkkk :)
Alright so what you are doing is getting the area of the whole triangle, and that formula is what you do so bxh is 5x12 and 5x12=60 then you need to divide 60 by 2 which is 30 so your answer will be
B 30m^2
1 * 12 = -40
12 = -40
Since its not possible for twelve to equal negative-forty, than there is no answer for this equation.