Question

Resolva as equações:
a) 27×= 3
b) 25 = 5/5x
c) 3.7×=72-64×

Answer 1

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