Question 395511
Hey, 
So for this one, we need to put this question into number form:
S = 2H 
S + H = 5(H-28)
Then we substitute 2H for S in the second equation:
2H + H = 5(H-28)
Then we distribute 5 over the right side:
3H = 5H - 140
then we add 140 to both sides and subtract 3H from both sides:
3H - 3H + 140 = 5H - 3H - 140 + 140 =>
140 = 2H
Then we divide both sides by 2:
H = 70
I hope this helps!