Câu hỏi của Nguyễn Trâm

Question

-4 (x - 10) +5 = -2x - (x+7) - (-20 +8)

Thanh Trà · Accepted Answer

$-4\left(x-10\right)+5=-2x-\left(x+7\right)-\left(-20+8\right)$

$\Leftrightarrow-4x+40+5=-2x-x-7+20-8$

$\Leftrightarrow-4x+2x+x=-40-5-7-20-8$

$\Leftrightarrow-x=-80$

$\Leftrightarrow x=80$

Vậy...Câu trả lời: $-4\left(x-10\right)+5=-2x-\left(x+7\right)-\left(-20+8\right)$

$\Leftrightarrow-4x+40+5=-2x-x-7+20-8$

$\Leftrightarrow-4x+2x+x=-40-5-7-20-8$

$\Leftrightarrow-x=-80$

$\Leftrightarrow x=80$

Vậy...

Hoa học trò · Answer

−4(x−10)+5=−2x−(x+7)−(−20+8)−4(x−10)+5=−2x−(x+7)−(−20+8)

⇔−4x+40+5=−2x−x−7+20−8⇔−4x+40+5=−2x−x−7+20−8

⇔−4x+2x+x=−40−5−7−20−8⇔−4x+2x+x=−40−5−7−20−8

⇔−x=−80⇔−x=−80

⇔x=80⇔x=80Câu trả lời: −4(x−10)+5=−2x−(x+7)−(−20+8)−4(x−10)+5=−2x−(x+7)−(−20+8)

⇔−4x+40+5=−2x−x−7+20−8⇔−4x+40+5=−2x−x−7+20−8

⇔−4x+2x+x=−40−5−7−20−8⇔−4x+2x+x=−40−5−7−20−8

⇔−x=−80⇔−x=−80

⇔x=80⇔x=80

Võ Thiết Hải Đăng · Answer

−4(x−10)+5=−2x−(x+7)−(−20+8)−4(x−10)+5=−2x−(x+7)−(−20+8)

−4x+40+5=−2x−x−7+20−8⇔−4x+40+5=−2x−x−7+20−8

−4x+2x+x=−40−5−7−20−8⇔−4x+2x+x=−40−5−7−20−8

−x=−80⇔−x=−80

x=80Câu trả lời: −4(x−10)+5=−2x−(x+7)−(−20+8)−4(x−10)+5=−2x−(x+7)−(−20+8)

−4x+40+5=−2x−x−7+20−8⇔−4x+40+5=−2x−x−7+20−8

−4x+2x+x=−40−5−7−20−8⇔−4x+2x+x=−40−5−7−20−8

−x=−80⇔−x=−80

x=80

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