Question

resolva as equações 21x-7(33-x)=3(21x-14)+44

Answer 1

21x-7(33-x)=3(21x-14)+44

21x-231+7x=63x-42+44

21x+7x-63x=-42+44+231

-35x=233

-x=233/35

 x=-233/35

 

Answer 2

21x-7(33-x)=3(21x-14)+44

2 1 x - 2 3 1 + 7 x = 6 3 x - 4 2 + 4 4

2 8 x - 2 3 1 = 6 3 x - 4 2 + 4 4

2 8 x - 2 3 1 = 6 3 x + 2

- 2 3 1 = 6 3 x + 2 - 2 8 x

- 2 3 1 = 3 5 x + 2

- 2 3 1 - 2 = 3 5 x

- 2 3 3 = 3 5 x

-233/35 =x

x=-233/35