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Rezolvati in R :
a) 2(x-3) = 3(x+2 )
b) 4x +11+5(x+4)=2x+3
Va roog !


Răspuns :

rezolvare:2x-6=3x+6
2x-3x=6+6
-x=12

4x+11+5x+20=2x+3
9x+31=2x+3
9x-2x=3-31
7x=-28
x=-4
a)
2(x-3) = 3(x+2)
2x-6 = 3x+6
3x-2x = -6-6
x = -12 ∈ R

b)
4x+11+5(x+4) = 2x+3
4x+11+5x+20 = 2x+3
9x+31=2x+3
9x-2x=3-31
7x=-28
x=-28:7
x=-4 ∈ R