1) -6(9-5х)=9x+9; 2) -3(1+4x)=-4x-5; 3) -6(-5-7х)=-8х+2

Question

1) -6(9-5х)=9x+9; 2) -3(1+4x)=-4x-5; 3) -6(-5-7х)=-8х+2

Answer 1

-6(9-5х)=9x+9

-54+30x=9x+9

30x-9x=9+54

21x=63

x=63:21

x=3

 

  -3(1+4x)=-4x-5

-3-12x=-4x-5 

-12x+4x=-5+3

-8x=-2

x= 0.25

 

 -6(-5-7х)=-8х+2

30+42x=-8x+2

42x+8x=2-30

50x=-28

x=- 5.6