Question

Rezolvați ecuațiile. Mulțumesc mult !

Answer 1

a)

3x-5=22/+5

3x=27

x=27/3

x=9

b)

5x+4=7x+1

5x-7x=1-4

-2x=-3/×(-1)

2x=3

x=3/2

c)

2(x-3)+1=5-4(x-2)

2x-6+1=5-4x+8

2x+4x=5+8+6-1

6x=18

x=18/6=3

Answer 2

Salutare!

b)

$\bf 3x-5=22$

$\bf 3x=22+5$

$\bf 3x=27\:\:\:|:3$

$\boxed{\bf x = 9}$

c)

$\bf 5x+4=7x+1$

$\bf 4=7x+1-5x$

$\bf 4=2x+1$

$\bf 4-1=2x$

$\bf 2x=3$

$\boxed{\bf x = \dfrac{3}{2} }$

 

d)

$\bf 2(x-3)+1=5-4(x-2)$

$\bf 2x-6+1=5-4x+8$

$\bf 2x-5=13-4x$

$\bf 2x+4x-5=13$

$\bf 6x=13+5$

$\bf 6x=18\:\:\:|:6$

$\boxed{\bf x = 3}$