Question

pls pls pls dau coroana ​

Answer 1

-13x+4-21-4x=0

-17x-17=0

-17(x+1)=0

x= -1

0.3x-0.6-0.1x-0.8=0

0.2x-0.14=0

0.2x=0.14

x= 0.14÷0.2

x=7

-12x+9-6x-27=0

-18x-18=0

-18(x+1)=0

x= -1

Luam d) acum: x+2x+3x=6

6x=6=> x=1

f)1-x+4-x+27-x-50=0

-3x-18=0

-3x=18

x= -6

n) 3x-6+2x-6-4x+12=0

x+0=0

x=0