Solve the following equations. a. q + 35 = 78 b. 200 + x = 450 c. k - 68 = 72 d. 437 - m = 25

a) q + 35 = 78 (subtract 35 from 78)

q = 43

b) 200 + x = 450 (subtract 200 from 450)

x = 250

c) k - 68 = 72 (add 68)

k = 140

d) 437 - m = 25 (you can do this in one step, but add m to other side or divide everything by - 1 to get m pos)

m + 25 = 437 (subtract 25)

m = 412