Answer:
-6x=-58
Step-by-step explanation:
1+3x /4= 5/2
1+3x = 5*4/2
1+3x =10
3x =9
x = 3
Answer:
$163.85
Step-by-step explanation:
Since the cost of the couch is $113.00 then this is the original 100% price. To find a 45% mark up then find 145%. Remember 100+45 = 145. To find the price set up a proportion with these values:

Solve for the price by cross multiplying numerator with denominator.
x(100) = 113(145)
100x = 16385
x= 163.85
Let the side length of the original square be x, then
1/4 x^2 = (x - 3)^2
x^2 = 4(x^2 - 6x + 9) = 4x^2 - 24x + 36
3x^2 - 24x + 36 = 0
3(x^2 - 8x + 12) = 0
x^2 - 8x + 12 = 0
x^2 - 2x - 6x + 12 = 0
x(x - 2) - 6(x - 2) = 0
(x - 6)(x - 2) = 0
x - 6 = 0 or x - 2 = 0
x = 6 or x = 2
therefore, the side length of the original square is 6 inches.
Hope this helps!