Respostas

2014-05-29T09:39:41-03:00
A) 5x=625 x=625÷5. ×=125
b) 2×+8=32. 2×=32-8. 2×=24. ×=24÷2. ×=12
c) 2*8×=64. 16×=64. ×=64÷16. ×=4
d) 6×+4=3×+22. 6×-3×=22-4. 3×=18. ×=18÷3. ×=6
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