a fost răspuns

Sa se rezolve in R:
a) (3x-1)/ 4 - (x+2)/5= x
b)3(2-4x)-5x(6+5x)=2-(5x+1)²

Răspuns :

Miky93ask
a) aducem la acelasi numitor
5(3x-1) -4(x+2)=20x
15x-5 -4x-8=20x
11x-13=20x
11x-20x=13
-9x=13
x= -13/9

b)6-12x-30x-25x²=2-25x²-10x-1
-25x²-42x+6= -25x² -10x +1

-42x+6=-10x+1
-42x+10=1-6
-32x=-5
32x=5
x=5/32
MFMask
a) aduci la acelasi numitor si obtii
15x-5-4x-8=20x
9x=-13
x=-13/9
b) 6-12x-30x-25x²=2-25x²-10x-1
32x=5
x=5/32

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