Răspuns:
Explicație pas cu pas:
a) 3x + 7 = -2x - 8 => 3x+2x=-8-7 => 5x = -15 => x = -3
b) 9x - [tex]\frac{1}{7}[/tex] = [tex]\frac{10}{14}[/tex] + 4x => 9x-4x=[tex]\frac{10}{14}[/tex] + [tex]\frac{1}{7}[/tex] => 5x = [tex]\frac{10}{14}[/tex] + [tex]\frac{2}{14}[/tex] => 5x = [tex]\frac{12}{14}[/tex] => 5x = [tex]\frac{6}{7}[/tex] => x = [tex]\frac{6}{35}[/tex]
c) ([tex]\frac{2}{3}[/tex] - [tex]\frac{1}{2}[/tex])x = -4 =>( [tex]\frac{4}{6}[/tex] - [tex]\frac{3}{6}[/tex])x = -4 => [tex]\frac{1}{6}[/tex]x = -4 => x = - [tex]\frac{1}{24}[/tex]
d) [tex]\frac{x}{2}[/tex] + 1 + [tex]\frac{x}{3}[/tex] = 8 => [tex]\frac{x}{2}[/tex] + [tex]\frac{x}{3}[/tex] = 8-1 => [tex]\frac{3x}{6}[/tex] + [tex]\frac{2x}{6}[/tex] = 7 => [tex]\frac{5x}{6}[/tex] = 7
e) 2 + 3(x+4) = x+5(x-5) => 2+3x +12 = x+5x-15 => 3x-5x -x = -15 - 2-12 => -3x = -29 => x = [tex]\frac{29}{3}[/tex]
f)
