Answer:
X=-9
Step-by-step explanation:
First, distribute the 2. So, it would be 2x-6+21=-3. Then, bring the -6 and 21 to the right side. It would now be 2x= -18. X would be equal to -9.
Hope this helps!
37.5
the triangle is enlarged by a factor of 2.5 so you multiply all of the numbers in XYZ by 2.5 then add them
15+10+12.5=37.5 units
Hope this helped!! Have an amazing day :D
