Question

rezolvati ecuatiile : a) 2,5x-4,7=3(1,5x+2),,b) 10(x-3)=4 (6x+7)-2.........c)(2+radical 3)x-2+radical 3 =0...........d)radical 3x+4=1-2radical 3x...................va rog ca dau coroana..........









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Answer 1

a)2,5x-4,7=3(1,5x+2)
2,5x-4,7=4,5x+6
2,5x-4,5x=4,7+6
-2x=10,7     inmultim -1
x=-10,7/2
x=-5,35

b)10(x-3)=4(6x+7)-2
10x-30=24x+28-2
10x-24x=30+26
-14x=56    inmultim -1
14x=-56
x=-56/14
x=-4

c)(2+√3)x-2+√3=0
(2+√3)x=2-√3
x=(2-√3)/(2+√3)
x=[(2-√3)(2-√3)]/(4-3)
x=(4-4√3+3)
x=7-4√3

d)√3x+4=1-2√3x
√3x+2√3x=1-4
3√3x=-3
x=-3/3√3
x=-3√3/9
x=-√3/3