Question

[•¢ɦẹρ➻¢ɦẹρ]

đáp án thôi ạ
 

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Answer 1

[ace dragon]

a) -10

b)6

c)-21

d)-25

tick nhé

Answer 2

[Nguyễn Lê Phước Thịnh]

a: =>x=-5x4:2=-10

b: =>48/x=8

hay x=6

c: \(\Leftrightarrow x=-14\cdot\dfrac{3}{2}=-21\)

d: \(\Leftrightarrow\dfrac{5}{x}=\dfrac{-1}{5}\)

hay x=-25

e: \(\Leftrightarrow x-2=12\)

hay x=14

f: \(\Leftrightarrow x+3=-5\)

hay x=-8

g: \(\Leftrightarrow x^2=100\)

hay \(x\in\left\{10;-10\right\}\)

h: \(\Leftrightarrow xy=-6\)

hay \(\left(x,y\right)\in\left\{\left(1;-6\right);\left(-6;1\right);\left(-1;6\right);\left(6;-1\right);\left(2;-3\right);\left(-3;2\right);\left(-2;3\right);\left(3;-2\right)\right\}\)

i: =>\(-4\left(x-5\right)=3x+6\)

=>-4x+20=3x+6

=>-7x=-14

hay x=2

k: =>3(x+1)=2(x-2)

=>3x+3=2x-4

hay x=-7