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-a = -7
a = 7
b) a - 29 = 15
a = 44
c) 12 : m = 1/4
12 * 1/m = 1/4
12/m = 1/4
m/12 = 4 / * 12
m = 48
d) x * 3 1/2 = 2/7
7/2x = 2/7 / * 2/7
x = 4/49
e) 12 1/3 + k = 16 5/6
k = 16 5/6 - 12 2/6 = 4 3/6 = 4 1/2
f) 8 1/5 + c = 10 7/10
c = 10 7/10 - 8 2/10 = 2 5/10 = 2 1/2
g) 4 2/3 * p = = 4
14/3p = 4 / * 3/14
p = 12/14 = 6/7
h) a : 1 1/3 = 1/6
a * 3/4 = 1/6
3/4a = 1/6 / * 4/3
a = 4/18 = 2/9