0
Anonymous
7z+9 = 72
7z = 72-9
7z = 63
z = 9
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If Z = 3, then (9 + 7Z) = [ 9 + 7(3) ] = 9 + 21 = 30
x8+9=81 -9 -9 x8 =72 /8 /8 x= 9
72
10
8 x 9 = 72