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3x-8x=-45-4
-5x=-41
x=-41/-5
x=41/5=8.2
4+45=8x-3x
49=5x
5x=49
x=9.8
12x-29=6+5x
12x-5x= 6+29
7x=35
x=5
27-5x-3x=2+7x-5
27-2+5=7x+3x+5x
30=15x
x=2
2a) x+x = 75
b)3x+7= 70
c) 1/3x-25= 12
d) 3x × 6