Answer: x is the variable
Step-by-step explanation:
Anytime you see a letter in an expression it is a variable. Remember this, this is incredibly important. Good luck!
Answer:
ps no c q es xd pero investigare
Two sides are 3x longer than the shortest side. So, set up your problem like this.
X = unknown length in centimeters
3X = length of two longer sides
1X = length of short side
3x + 3x + 1x = 49
7x = 49
x = 7
So, two longer sides are 21 centimeters each and the short side is 7 centimeters.
21+21+7 = 49
Y=3x+8 gdhdhddhdhdhdhdhdhdhdhddhdhdhdddd
3ax-8a=b-18x
3ax+18x=b+8a
3x(a+6)=b+8a
3x=(b+8a)/(a+6)
x=(b+8a)/3(a+6)
3a*(b+8a)/3(a+6)=b-18*(b+8a)/3(a+6)
a(b+8a)/(a+6)=b-6(b+8a)/(a+6)
a(b+8a)=b(a+6)-6(b+8a)
ab+8a^2=ab+6b-6b-48a
ab+8a^2=ab-48a
8a^2=-48a
8a^2+48a=0
8a(a+6)=0 so a=0,-6
0=b-18x or -18x+48=b-18x
-b=-18x or 48=b
let b=18 if a =-6
