9x + 12 - 5x =-4

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x = -4

Step-by-step explanation:

9x + 12 - 5x = -4

4x + 12 = -4

4x = -4 - 12

4x = -16

x = -4

hope this helps! :)

area of rectangle a is 2 times that of rectangle b that means 2x+x =   36cm^2

3x = 36cm ^2

x = 36/3

x= 12cm^2

and 2x = 24cm^2

now side of square = are divided by sides = 36/4 = 6cm

that means length of rectangle a and b is 6cm too

now for rectangle a,

l*b = area

= 6*y=24

y=24/6 = 4

therefore dimensions of rectangle a are- length = 6cm, breadth = 4cm

and for rectangle b, length = 6cm and breadth = 6-4 = 2cm.

hope this .

$25 becasue a 10 increase would make it from 80 to 50