Answer:
28
Step-by-step explanation:
2x + 3x + 40 =180
5x= 180 - 140
5x=140
x= 28
15cm
a^2+b^2=c^2
12^2+9^2=c^2
144+81=c^2
c^2=225
c=15
Given that: step 1
step 2: subtract 3x both side
Step 3: Add 18 both side:
Step 4: divide both side by 5
Step:6 The value of x is:
x=6
ion even know