Question

REzolvati in multimea numerele radionale ecuatiile:
a)2(x-24)+113=3(15-x)
b)56-4(11-3x)=6(5x-4)
c)10(1-6x)-74=8(3-8x)
d)4(5x-7)+21=3(6x-11)
e)55-5(4x-1)=10(3x-3)
f)-81-4(7-3x)=13(x-8)

Answer 1

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

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

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

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

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

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