Question

[Ngọc Hân]

Tìm x thuộc Z

A, 3 - (17-x)=-24+12

B, -5+(16-x)=2².3-5²

C, -26-(x-7)=3⁴-9²

D, -36-(4-x)=37+(-5)

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Answer 1

[ღᏠᎮღ🅼🅸🅽🅷ঔ🅽🅶ụ🆈ঌ__[ᴅʀᴇᴀм тᴇᴀм]__]

\(a)3-\left(17-x\right)=-24+12\)

\(\Leftrightarrow3-17+x=-12\)
\(\Leftrightarrow-14+x=-12\)

\(\Leftrightarrow x=-12+14=2\)

Answer 2

[Kuroba Kaito]

a)  3 - (17 - x) = -24 + 12

=> 3 - 17 + x = -12

=> -14 + x = -12

=> x = -12 + 14

=> x = 2

b) -5 + (16 - x) = 2².3 - 5²

=> -5 + 16 - x = 12 - 25

=> 11 - x = -13

=> x = 11 + 13

=> x = 24

c) -26 - (x - 7) = 3⁴ - 9²

=> -26 - x + 7 = 81 - 81

=> -19 - x = 0

=> x = -19 - 0

=> x = -19

d) -36 - (4 - x) = 37 + (-5)

=> -36 -  4 + x = 32

=> -40 + x = 32

=> x = 32 + 40

=> x = 72