Question

va rog, am nevoie rapid dau coroana ​

Answer 1

Pai e simplu
12-17= -5
3x= 22+5=27
x=9
5x-7x=1-4=-2x=-3=x=3:2=x=1,5

Answer 2

Explicație pas cu pas:

a) x= 12-17

x=-5

b)3x=22+5

3x=27

x=9

c)5x+4=7x+1

5x-7x=1-4

-2x=-3

x=3/2

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

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

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

6x=18

x=3