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5(6-3n)+2n=13
30-15n+2n=13
30-13=15n-2n
17=13n
17/13=n
t=1-22
t= -21
2t=2-32
2t=-30
t=-15
m-5=n
m-(m-5)=25
m-m+5=25
5=25 (F)
3a-11b=5
a=5+11b/3
2(5+11b/3)+4b=1
10+22b+12b/3=1
10+34b=3
34b=-7
b=-7/34