[tex]\frac{x+5}{3} + \frac{x-3}{4} = \frac{7}{2}[/tex]⇒[tex]\frac{4(x+5) + 3(x-3)}{12} = \frac{42}{12}[/tex] ⇒ [tex]\frac{4x +20 + 3x - 9}{12} = \frac{42}{12}[/tex] ⇒ [tex]\frac{7x + 11}{12} = \frac{42}{12} \\[/tex]⇒ [tex]\frac{7x}{12} = \frac{42 -11}{12}[/tex]
⇒[tex]x = \frac{31}{7}[/tex]
[tex]\frac{-2x+14-15+12x}{12} = \frac{28} {12}[/tex] ⇒ [tex]10x - 1 = 28 \\[/tex] ⇔ [tex]x = \frac{29}{10}[/tex]
[tex]\frac{5(7x-5)+2(4-5x)}{10} = \frac{152}{10}[/tex] ⇒ [tex]35 x -25 +8 -10x = 152[/tex] ⇒ [tex]25x-17= 152[/tex] ⇒ [tex]x = \frac{135}{25} = \frac{27}{5}[/tex]
[tex]\frac{3(4x+3) - 7(1-6x)}{21} = \frac{19}{21}[/tex] ⇒ [tex]12x +9 -7 +42x =19[/tex] ⇒ [tex]54x = 19-2[/tex] ⇒ [tex]x = \frac{17}{54}[/tex]
