100
5h + 2 + 2h = 23
h = 3
300
4(y - 2) + y = -13
y = -1
300
7(4 - t) = -84
t = 16
300
3a + 12 - 6a = -9
a = 7
400
-6(m + 1) + 18 = 24
m = -2
400
-2(x - 9) = -24
x = 21
400
-6 = -3y + 4 + 5y
y = -5
500
7k - 8 + 2(k + 12) = 52
k = 4
500
-13(4 + 2a) = 208
a = -10
500
78 = 3c + 12 - c + 4
c = 31