Suppose x is a number such that 2x=x/2-6. must it then be true that 3x=12. explain your reasoning

2x = x/2 - 6multiply both sides by 2
4x = x - 12
4x - x = -12
3x = -12
x = -12/3
x = -4

3x = 123(-4) = 12-12 = 12...falseso 3x = 12 is not true because x = -4

Recall that area of the triangle is 1/2*(base)*(height)1/2*(13)*(17) = 110.5the answer is 110.5