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2014-10-28T18:23:42+02:00
A) x=-7/2
b) x=15/3=5
c) x=15/6=5/2
d) x=0
e) 4/5x+3/10=0⇒ 4*10+3*5x=0⇒40+15x=0⇒15x=-40⇒x=-40/15⇒x=8/3
f) 4x-0.4=0⇒ 4x=0.4⇒x=(4/10) *(1/4)=1/10=0,1
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