solve for h

Question

problem 1 solve for h

r=4h+4w

 

the solution is h=

 

problem 2 solve for x

z=13+2(x+y)

 

the solution is x=

Answer 1

r = 4h + 4w     subtract 4w from both sides

r - 4w = 4h     divide both sides by 4

(r - 4w)/4 = h

 

z = 13 + 2(x + y)   distribute the 2

z = 13 + 2x + 2y    subtract 13 from both sides

z - 13 = 2x + 2y     subtract 2y from both sides

z - 13 - 2y = 2x      divide both sides by 2

(z - 13 - 2y)/2 = x