Rezolvati urmatoarele ecuatii,unde x este o fractie zecimala:a)2x+3,5=5,3 b)3x-0,12=12 c)11,5-5x=1,1 d)8,25+8x=21,19 e)5,75+x=24,23 f)4x+18,3=35,8 g)2x-6,3=1,8 h)2,33+5x=13,25 i)1,5x-3,25=2,75 j)4x-1=13,44 k)x*5+7,15=17,15 l)x:2,25+8=13 m)x:6+13,51=29,39 n)2x+1,57=12,37 0)(x+3)*2,5=14,5 cu calcul dau 30 puncte
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a)2x+3,5=5,3⇒2x=5,3-3,5⇒2x=1,8⇒x=1,8/2=0,9
b)3x-0,12=12⇒3x=12+0,12⇒3x=12,12⇒x=12,12/3⇒4,04
c)11,5-5x=1,1⇒-5x=1,1-11,5⇒-5x=-10,4⇒x=10,4/5⇒x=2,08
d)8,25+8x=21,19⇒8x=21.19-8,25⇒8x=12,94⇒x=12,94/8⇒x=1,61(x=12,94/8)
e)5,75+x=24,23 ⇒x=24,23-5,75⇒x=18,48
f)4x+18,3=35,8⇒4x=35,8-18.3⇒4x=17,5⇒x=17,5/4⇒x=4,375
g)2x-6,3=1,8⇒2x=1,8+6,3⇒2x=8,1⇒x=8,1/2⇒x=4,05
h)2,33+5x=13,25⇒5x=13,25-2,33⇒5x=10,92⇒x=10,92/5⇒x=2,18
i)1,5x-3,25=2,75⇒1,5x=2,75+3,25⇒1,5x=6⇒x=6/1,5⇒x=4
j)4x-1=13,44⇒4x=13,44+1⇒4x=14,44⇒x=14,44/4⇒x=3,61
k)x*5+7,15=17,15⇒5x=17,15-7,15⇒5x=10⇒x=10/5⇒x=2
l)x:2,25+8=13⇒x:2,25=13-8⇒x:2,25=5⇒x=5*2,25⇒x=11,25
m)x:6+13,51=29,39⇒x:6=29,39-13,51⇒x:6=15,88⇒x=15,88*6⇒x=95,28
n)2x+1,57=12,37⇒2x=12,37-1,57⇒2x=10,8⇒x=10,8/2⇒x=5,4
0)(x+3)*2,5=14,5⇒x+3=14,5/2,5⇒x+3=5,8⇒x=5,8-3⇒x=2,8
b)3x-0,12=12⇒3x=12+0,12⇒3x=12,12⇒x=12,12/3⇒4,04
c)11,5-5x=1,1⇒-5x=1,1-11,5⇒-5x=-10,4⇒x=10,4/5⇒x=2,08
d)8,25+8x=21,19⇒8x=21.19-8,25⇒8x=12,94⇒x=12,94/8⇒x=1,61(x=12,94/8)
e)5,75+x=24,23 ⇒x=24,23-5,75⇒x=18,48
f)4x+18,3=35,8⇒4x=35,8-18.3⇒4x=17,5⇒x=17,5/4⇒x=4,375
g)2x-6,3=1,8⇒2x=1,8+6,3⇒2x=8,1⇒x=8,1/2⇒x=4,05
h)2,33+5x=13,25⇒5x=13,25-2,33⇒5x=10,92⇒x=10,92/5⇒x=2,18
i)1,5x-3,25=2,75⇒1,5x=2,75+3,25⇒1,5x=6⇒x=6/1,5⇒x=4
j)4x-1=13,44⇒4x=13,44+1⇒4x=14,44⇒x=14,44/4⇒x=3,61
k)x*5+7,15=17,15⇒5x=17,15-7,15⇒5x=10⇒x=10/5⇒x=2
l)x:2,25+8=13⇒x:2,25=13-8⇒x:2,25=5⇒x=5*2,25⇒x=11,25
m)x:6+13,51=29,39⇒x:6=29,39-13,51⇒x:6=15,88⇒x=15,88*6⇒x=95,28
n)2x+1,57=12,37⇒2x=12,37-1,57⇒2x=10,8⇒x=10,8/2⇒x=5,4
0)(x+3)*2,5=14,5⇒x+3=14,5/2,5⇒x+3=5,8⇒x=5,8-3⇒x=2,8
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