Question

Rezolvati in multimea numerelor reale ecuatiile

a)5x-6=4(x+2)=3x+2

b)3(2x-1)+2(2-x)=x-8

c)2(1-x)-5(1-2x)=5

d)2(1-2x)-3(2-3x)+4(3-4x)=5(4-5x)

DAU COROANA va roooooog

Answer 1

Răspuns:

a)5x-6=4x+8=3x+2

5x-4x=+8+6=3x+2

x=+14=3x+2

x-3x=+2-14

-2x=-12

x=-12(-2)

x=-6

b)3(2x-1)+2(2-x)=x-8

6x-4+4-2x=x-8

6x-2x-x=-8+4-4

3x=0

c)2(1-x)-5(1-2x)=5

2-2x-5-2x=5

-2x-2x=5-2+5

-4x=8

X=8:4

X=2

d)2(1-2x)-3(2-3x)+4(3-4x)=5(4-5x)

2-4x-6-9x+12-16x=20-25x

-4x-9x+25x=20-2+6-12

+12x=12

z=0