Question

Me ajuda por favor para amanhã​

Answer 1

Resposta

g)

$\dfrac{x-4}{3}-1=x-\dfrac{\not2^1}{\not8_4}\\ \\ mmc(3,4)=12\\ \\ \\ 4(x-4)-12=12x-3\\ \\ 4x-16-12=12x-3\\ \\ 4x-12x=-3+16+12\\ \\ -8x=28-3\\ \\ -8x=25~~~~\times(-1)\\ \\ 8x=-25\\ \\\boxed{ x=-\dfrac{25}{8}}$

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r)

$mmc(2,6,3,2)=6\\ \\ 9(2x+1)-1(2x+1)=20(x+2)-3(6x-1)\\ \\ 18x+9-2x-1=20x+40-18x+3\\ \\ 18x-2x-20x+18x=40+3+1-18\\ \\ 36x-22x=44-9\\ \\ 14x=35\\ \\ x=\dfrac{35}{14}~~~\div(7)\\ \\\boxed{ x=\dfrac{5}{2}}$