Explicație pas cu pas:
a) 1,3×x+2,73=2×(1,2×x-1)
1,3x+2,73=2,4x-2
1,3x-2,4x=-2-2,73
-1,1x=-4,73
x=4,3
b)
[tex] \frac{x}{2} + \frac{4}{9} = \frac{x + 7}{6} [/tex]
[tex]9x + 8 = 3(x + 7)[/tex]
[tex]9x + 8 = 3x + 21[/tex]
[tex]9 \times - 3 \times = 21 - 8[/tex]
[tex]6x = 13[/tex]
[tex]x = \frac{13}{6} [/tex]
c)
[tex] \frac{5 \times x}{10} = \frac{2 \times x - 3}{6} + \frac{1}{3} [/tex]
[tex]3(5 x - 1) = 5(2x - 3) + 10[/tex]
[tex]15x - 3 = 10x - 5[/tex]
[tex]15x - 10x = - 5 + 3[/tex]
[tex]5x = - 2[/tex]
[tex]x = - \frac{2}{5} [/tex]
Sper că te-am ajutat!!~~
coroana?
