Forming and solving equation
a) rectangle a has one side which is 6cm long and the other is (x+2)cm long. rectangle b has sides of length (2x+1) and 3cm. if the perimeters are the same, calculate the value x and hence, the lengths of the sides of the rectangles

b) rectangle x measures 7cm by (x+1)cm. rectangle y has dimensions of (3x+6)cm and 4cm. the area of rectangle x is half the area of rectangle y. calculate the lengths of the sides of the rectangles, and hence, their areas

c) adam has sticks of the following lengths: (3x+4)cm (2x+10)cm (x+12)cm
he puts all 3 sticks together to make a triangle. the triangle is isosceles. calculate the 3 possible values of x

all working out