Resolva as equações:
a) 27×= 3
b) 25 = 5/5x
c) 3.7×=72-64×
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a) 27x = 3
==> x = 3/27...(÷3)
==> x = 1/9
b) 25 = 5/5x
==> 5/5x = 25
==> x = 25
c) 3.7x = 72 - 64x
==> 21x + 64x = 72
==> 85x = 72
==> x = 72/85
==> x = 3/27...(÷3)
==> x = 1/9
b) 25 = 5/5x
==> 5/5x = 25
==> x = 25
c) 3.7x = 72 - 64x
==> 21x + 64x = 72
==> 85x = 72
==> x = 72/85
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