Question

Ex 13 dau corona si 50 de puncte

Answer 1

a) 3(2x-11)=2x-41

6x-33=2x-41

6x-2x= -41+33

4x= -8

x= -8:4

x= -2

b) 11x-1=4(7x+5)

11x-1=28x+20

11x-28x=20+1

-17x=21

x=21/(-17)

x= -21/17

c) 5(1-4x)= -7-16x

5-20x= -7-16x

-20x+16x= -7-5

-4x= -12

x=(-12):(-4)

x=3

d) 2(5x-4)=7x-20

10x-8=7x-20

10x-7x= -20+8

3x= -12

x= -12:3

x= -4

e) 20x+13=6(5x-7)

20x+13=30x-42

20x-30x= -42-13

-10x= -55

x=(-55)/(-10)

x=55/10

x=11/2

f) 5(8-3x)=20x-10

40-15x=20x-10

-15x-20x= -10-40

-35x= -50

x= (-50)/(-35)

x=50/35

x=10/

Answer 2

Baftă! (❁´◡`❁)

--------------------------

Am sărit peste una

2(5x-4)=7x-20 ⇒ 10x-8=7x-20 ⇒ 10x-7x=-20+8 ⇒ 3x=-12 ⇒ x=-4