Answer:
4
Step-by-step explanation:
3x+15=27
3x=12
x=4
that is the steps
3x + 15= 27
-15. -15
3x = 12
÷3
x= 4
Answer:32mm
area of triangle = 1/2 *base * height
192mm2 = 1/2 *b* 12mm
192 =6b
base=192/6
base= 32mm
Check the picture below.