Question

me ajudem



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Answer 1

Resposta:

a) 4x+3x= 20. R=8

7x=20

x=8

b)3x+13+48. R=20

3×=61

x=20

c) 3x=111. R= 37

x=37.

d)3/10 +1/4+1/10

= 013 × 280

R=3380