👤

a)3(2x-1)-2(3x-5)=7
b)27-3(2x+3)=2(1-3x)
c)4(x+2)-3x=3x+5


Răspuns :


a) 3(2x-1)-2(3x-5)=7
6x-3-6x+10=7
6x-6x+10-3=7
7=7 Adevarat=> x poate avea orice valoare din multimea R

b)27-3(2x+3)=2(1-3x)
27-6x-9=2-6x
18-6x=2-6x  FALS

c)4(x+2)-3x=3x+5
4x+8-3x=3x+5
x+8=3x+5
8-5=3x-x
3x=2
x=2/3
a) 3(2x-1)-2(3x-5)=7
6x-3-6x+10=7
6x-6x+10-3=7
7=7 Adevarat=> x poate avea orice valoare din multimea R

b)27-3(2x+3)=2(1-3x)
27-6x-9=2-6x
18-6x=2-6x  FALS

c)4(x+2)-3x=3x+5
4x+8-3x=3x+5
x+8=3x+5
8-5=3x-x
3x=2
x=2/3