<span>Move all terms containing x to the left, all other terms to the right.
Add '-240' to each side of the equation.
240 + -240 + 12x = 372 + -240
Combine like terms: 240 + -240 = 0
0 + 12x = 372 + -240
12x = 372 + -240
Combine like terms: 372 + -240 = 132
12x = 132
Divide each side by '12'.
x = 11
Simplifying
x = 11</span>
Answer:
12 m
Step-by-step explanation:
perimeter is all of the sides together, so 2 7's and 2 x's. You would subtract 14 from 38 to get 24, then divide it by 2 to get the missing side, which is 12
4•(2x+1) 4•2x=8x 4•1=4
8x+4
-3=-3(x-4)
-3•x=-3x
-3•(-4)=12
-3=12-3x
-3=12
X=2