Question

Resolva as equaçoes:

A- X-4.(X-1)=9-2.(X+3)

B- 6.(X-3)+2.(2X+1)=4(5+X)

C- 3.(X+2)-4(1-2X)=6-5(X+1)

Answer 1

A- X-4.(X-1)=9-2.(X+3)

X-4X+ 4 = 9 - 2X + 6 ==> -3x + 2x = 15-4 ==> -x = 11(-1) ==> x = - 11
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B- 6.(X-3)+2.(2X+1)=4(5+X) 

6x - 18 + 4x + 2 = 20 + 4x ==. 10x-4x = 20+16 ==> 6x = 36 ==. x = 6
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C- 3.(X+2)-4(1-2X)=6-5(X+1)

3x + 6 - 4 + 8x = 6 - 5x - 5 ==. 11x +5x = 1-2 ==> 16x = - 1 ==> x = - 1/16