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26n = 26 l:26
n = 1
5z =75 l:5
z = 15
8x + 3 = 5x + 39 l-5x
3x +3 = 39 l-3
3x =36 l:3
x = 12
72=46+26n / -46
26=26n / :26
1=n
2.
5z=75 / :5
z=15
3.
8x+3=5x+39 / -5x
3x+3=39 / -3
3x=36 / :3
x=12
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