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1.rezolvati ecuatiile urmatoare,unde x €Q+:
a)2(7x+1)=5(2x+3)+1
b)4(5x+3)-7=3(4x+5)
c)7(3x-1)+3=3(20-x)
d)8(12+x)=x+7(16-x)
iar celălalt exercițiu e in poza
vreau repede(ex 10)


1rezolvati Ecuatiile Urmatoareunde X Qa27x152x31b45x3734x5c73x13320xd812xx716xiar Celălalt Exercițiu E In Pozavreau Repedeex 10 class=

Răspuns :

a) 14x+2=10x+15+1

    14x+2=10x+16

    14x-10x=16-2

    4x=14

    x=14/4=7/2.

b)20x+12-7=12x+15

    20x-12x=15-5

   8x=10

   x=10/8

   x=5/8.

c) 21x-7+3=60-3x

    21x-4=60-3x

    21x+3x=60+4

   24x=64

   x=64/24=8/3.

d) 96+8x=x+112-7x

    96+8x=-6x+112

   8x+6x=112-96

   14x=16

   x=16/14=8/7............../bara inseamna supra..