Question

rezolvati in multimea numerelor rationale ecuatiile :
a) 2(x-24)+113=3(15-x)
b) 4(5x-7)+21=3(6x-11)
c) 56-4(11-3x)=6(5x-4)
d) 55-5 (4x-1)=10(3x-3)
e) 10(1-6x)-74=8(3-8x)
f) -81-4(7-3x)=13(x-8)
URGENT nu trebuie tot dar pls macar ce stiti

Answer 1

 a) 2(x-24)+113=3(15-x)
2x-48+113= 45-3x
-48+113-45=-3x-2x
20=-5x  => x=-4

b) 4(5x-7)+21=3(6x-11)
20x-28 +21=18x-33
-28 +21+33=18x-20x
26=-2x   => x=-13

c) 56-4(11-3x)=6(5x-4)
56-44+12x=30x-24
56-44+24 =30x-12x
36=18x   => x=2

d) 55-5 (4x-1)=10(3x-3)
55- 20x +5 =30x-30
55+5+30 =30x+20
90=50x   x=9/5

e) 10(1-6x)-74=8(3-8x)
10-60x -74=24 -64x
10-74-24 =-64x+60x
-88=-4x     =>x=22

f) -81-4(7-3x)=13(x-8) 
-81-28+12x =13x-104
-81-28+104=13x-12x
x=-5

Sper ca te-am ajutat!

Answer 2

a) 2x - 48 + 113 = 45 - 3x
    2x + 3x = 45 - 65
    5x = - 20
    x = - 4
b) 20x - 28 + 21 = 18x - 33
    20x - 18x = - 33 + 7
    x = - 26/2
    x = - 13
c) 56 - 44 + 12x = 30x - 24
    12x - 30x = - 24 - 12
    - 8x = - 36
     x = 36 : 18
     x = 2
d) 55 - 20x + 5 = 30x - 30
    - 20x - 30x = - 60 - 30
    - 50x = - 90
     x = 9/5
e) 10 - 60x - 74 = 24 - 64x
     - 60x + 64x = 64 + 24
     4x = 88
     x = 88 : 4
     x = 22
f) - 81 - 28 +12x = 13x - 104
   12x - 13x = - 104 + 109
     x = - 5