Question

3x-2 supra 4 +5 supra 7 = x supra 2  ;

2x-1 supra 6=x/2-1/8;

4x+3 supra 5=x+9 supra 10;

Ajutorr, va rogg! :((

Answer 1

(3x-2) / 4 + 5/7 = x/2  ]·28    7(3x-2) +20 = 14x      21x -14 +20 = 14x  7x = - 6 ⇒ x= - 6/7
(2x-1)/6 = x/2 - 1/8  ]·24    4(2x-1) = 12x - 3     8x - 4 =12x - 3    4x= - 1    x= - 1/4
(4x+3)/5 = (x+9)/10  ]·10      2(4x+3) =x+9    8x+6=x+9    7x = 3    x=3/7

Answer 2

1. $3x- \frac{1}{2} + \frac{5}{7} = \frac{x}{2}$

$3*14*x-7*1+5*2=7*x$

$42x-7+10=7x$

$42x+3=7x$

$42x-7x=-3$

$35x=-3$

$x=- \frac{3}{35}$

2. $2x- \frac{1}{6} = \frac{x}{2} - \frac{1}{8}$

$24*2x- 4*1 = 12x- 3$

$48x- 4 = 12x- 3$

$48x-12x = - 3+4$

$36x =1$

$x= \frac{1}{36}$

3. $4x+ \frac{3}{5} =x+ \frac{9}{10}$

$10*4x+2*3 =10x+ 9$

$40x+6 =10x+ 9$

$40x-10x=9-6$

$30x =3$

$x= \frac{3}{10} = \frac{1}{10}$