Question

Rezolva ecuatiile in multimea Q:
a) 0,47x-0,14x=1,65
b)(4x-1):3=-1/3
c) 7/9x-2/3=2
d) -3*(2-15x)=-6

Answer 1

0.47x-0.14x=1.65⇔0.33x=1.65⇒x=1.65/0.33
7/9x-2/3=2⇒7/9x=2/3+2⇔7/9x=2+6/3⇒7/9=8/3⇒72x=21⇒x=21/72
(4x-1)÷3=-1/3⇒4x-1/3=-1/3-3=12x-3⇔12x=0⇒x=0
-3×(2-15x)=-6⇔-6+45x=-6⇒45x=0⇒x=0
succes