Question

Rezolvati ecuatiile in multimea numerelor reale:

a) 5x+9+3(2x-1)=2x+24
b) 3(x+2) +2(x-4)=4x+1
c)7x+8+2(5-x)=6+2(x+3)
d) 5(x-2)+4x-3=6x+11
e) 4x+7+5(x+3)=2x+1
f) 5(x+2)-3x=7+5x
g) 4(x+3)+2(x-5)=3x+11
h)5(x-1)+3x-4x-4=3x+11
i) 3x+9+2(3-x)=4+2(x+5)
j) 7(x+3)-3x=5+6(x+5)-4x

Answer 1

a) 5x+9+6x-3=2x+24
11x-2x= – 6 + 24
9x= 18
x= 18/9
x= 2

b) 3(x+2)+2(x-4)= 4x+1
3x+6+2x-8= 4x+1
5x- 4x = -2+1
x= -1

c) 7x+8+2(5-x)=6+2(x+3)
7x+8+10-2x= 6+2x+6
5x-2x= -18+12
3x= -6
x= -6/3
x= -2

d) 5(x-2)+4x-3=6x+11
5x- 10+4x-3=6x+11
9x-6x= 13+11
3x= 24
x= 24/3
x= 8

f)5(x+2)-3x=7+5x
5x+10-3x=7+5x
2x-5x= 7-10
-3x= -3
x= -3/-3
x= 1

g)4(x+3)+2(x-5)=3x+11
4x+12+2x-10=3x+11
6x-3x= -2+11
3x= 9
x= 9/3
x= 3

h) 5(x-1)+3x-4x-4=3x+11
5x-5+3x-4x-4=3x+11
4x-3x= 9+11
x= 20

i)3x+9+2(3-x)=4+2(x+5)
3x+9+6-2x= 4+2x+10
x-2x= -15+14
-x= -1
x= -1/-1
x= 1

j)7(x+3)-3x=5+6(x+5)-4x
7x+21-3x=5+6x+30-4x
4x-2x= -21+35
2x= 14
x= 7


Sper că te-am ajutat :))