Question

dau coroană!!!
am nevoie urgent, vă rog frumos!!!​

Answer 1

$\frac{x+5}{3} + \frac{x-3}{4} = \frac{7}{2}$⇒$\frac{4(x+5) + 3(x-3)}{12} = \frac{42}{12}$ ⇒ $\frac{4x +20 + 3x - 9}{12} = \frac{42}{12}$ ⇒ $\frac{7x + 11}{12} = \frac{42}{12}$⇒ $\frac{7x}{12} = \frac{42 -11}{12}$

⇒$x = \frac{31}{7}$

$\frac{-2x+14-15+12x}{12} = \frac{28} {12}$ ⇒ $10x - 1 = 28$ ⇔ $x = \frac{29}{10}$

$\frac{5(7x-5)+2(4-5x)}{10} = \frac{152}{10}$ ⇒ $35 x -25 +8 -10x = 152$ ⇒ $25x-17= 152$ ⇒ $x = \frac{135}{25} = \frac{27}{5}$

$\frac{3(4x+3) - 7(1-6x)}{21} = \frac{19}{21}$ ⇒ $12x +9 -7 +42x =19$ ⇒ $54x = 19-2$ ⇒ $x = \frac{17}{54}$