Question

A)  14-x-10=(-9)+15

B) IxI=5+7=10

C) IxI=(-12)+(-15)+8

D) Ix+5I=4-(-3)+5

E) IxI<4

Giúp mik với

Answer 1

a, 14 - x - 10 = -9 + 15

=> - x = 6 - 14 + 10

=> - x = 2

=> x = -2

vay_

b, |x| + 5 + 7 = 10

=> |x| = -2

=> x thuoc tap hop rong

vay_

Answer 2

A) 14-x-10 = ( -9) + 15

14-x-10 = 6

14-x=6 + 10

14-x = 16

x = 14 - 16 

x = -2

Answer 3

a,\(14-x-10=\left(-9\right)+15\)

\(-x=\left(-9\right)+15-14+10\)

\(x=-2\)

b,\(\left|x\right|=5+7-10\)

\(\left|x\right|=2\)

\(\Rightarrow x=\pm2\)

c,\(\left|x\right|=\left(-12\right)+\left(-15\right)+8\)

\(\Rightarrow\left|x\right|=-19\)

Vì \(\left|x\right|\ge0\Rightarrow x\in\varnothing\)

d,\(\left|x+5\right|=4-\left(-3\right)+5\)

\(\Rightarrow\left|x+5\right|=12\)

\(\Rightarrow\orbr{\begin{cases}x+5=12\\x+5=-12\end{cases}\Rightarrow\orbr{\begin{cases}x=7\\x=-17\end{cases}}}\)

\(\left|x\right|< 4\)

\(\Rightarrow x\in\left\{-4;-3;-2;-1;0;1;2;3\right\}\)