Question

Rezolvați ecuațiile : RASPUNDETI LA TOATE ...
a) 2.5x-1.3=1.2x+1.3
b) 53.1x+0.25=7.15x+96.745
c) 6.14+1.24x=3.44x-8.16
d) 15x-7.17=5x+1.13
e) 0.25x-0.25=0.2x-0.2
f) 0.3x-2.5=0.1x+2.5
g) 9x+3.46=7.96x+12.3
h) 2.5x+24=6.5x+7.6
i) 3.2x-15.3=0.9+0.5x
j) 10.7x+2.3=5.7x+15.05
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Answer 1

a) 2,5x-1,2x=1,3+1,3 => 1,3x=2,6 => x=2,6/1,3 => x=2
b)53,1x-7,15x=96,745-0,25 =>45,95x=96,495 => x=96,495/45,95 =>x=2,1
c)1,24x-3,44x=-8,16-6,14 =>-2,2x=-14,3 =>x=-14,3/-2,2=>x=6,5
d)15x-5x=1.13+7,17 =>10x=8,3=>x=8,3/10=>x=0,83
e)0.25x-0.2x=-0.2+0,25=>0,05x=0,05=>x=0,05/0,05=>x=1
f) 0.3x-0,1x=2.5+2,5=> 0,2x=5=>x=5/0,2=>x=25
g) 9x-7.96x=12.3-3,46=>1,04x=8,84=>x=8,84/1,04=>x=8,5
h) 2.5x-6,5x=7.6-24=> -4x=-16,4 =>x=-16,4/-4=>x=4,1
i) 3.2x-0,5x=0.9+15,3 =>2,7x=16,2=>x=16,2/2,7=>x=6
j) 10.7x-5,7x=15.05-2,3=>5x=12,75=>x=12,75/5=>x=2,55

Answer 2

a)2.5x-1.3=1.2x+1.3
2.5x-1.2x=1.3+1.3
1.3x=2.6
x=2.6:1.3
x=2
b)53.1x+0.25=7.15x+96.745
53.1x-7.15x=96.745-0.25
45.95x=96.495
x=96.495:45.95
x=2.1
c)6.14+1.24x=3.44x-8.16
1.24x-3.44x=-8.16-6.14
-2.2x=-14.3
x=-14.3:(-2.2)
x=-16.5
d)15x-7.17=5x+1.13
15x-5x=1.13+7.17
10x=8.3
x=8.3:10
x=0.83
e)0.25x-0.25=0.2x-0.2
0.25x-0.2x=-0.2+0.25
0.05x=0.05
x=0.05:0.05
x=1