determine o conjunto de soluções das expressões do primeiro grau

a)4×+2=38

b)9×=6×+12

c)5×-1=3×+11

d)2×+8=×+13

e)2 ×-5=×-7
4 3 2

f)4×+2 - 5×- 7=3-×
3 6 2

g)20×-4=5×

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