\(17-2x=52\)

\(2x=17-52\)

\(2x=-35\)

\(x=-35:2\)

\(x=-27,5\)

13 nha bn

hok tốt

TL:

=13 nha

a) 120−5⋅(20−2⋅32)=120−5(20−2⋅9)=120−5(20−18)=120−5⋅2=120−10=110120−5⋅(20−2⋅32)=120−5(20−2⋅9)=120−5(20−18)=120−5⋅2=120−10=110

b) 25:23−3⋅32+5⋅7=22−33+35=4−9+35=(−5)+35=3025:23−3⋅32+5⋅7=22−33+35=4−9+35=(−5)+35=30

c) 35⋅(85−47)+85⋅(47−35)=35⋅85−35⋅47+85⋅47−85⋅35=(35⋅85+85⋅47)−(35⋅47+85⋅35)=85(35+47)−35(47+85)=85⋅82−35⋅132=6970−4620=2350

Thanks bạn le thuy linh nha ^^ Mà sao bạn giống tên mk thế ?

a) (x⁵⁴)²=x

x¹⁰⁸=x

x¹⁰⁸: x=0

x^108-1=0

x¹⁰⁷=0

=>x=0

vậy x=0

b)2^x+3+2^x=144

2^x.2³+2^x=144

2^x.(2³+1)=144

2^x.(8+1)=144

2^x.9=144

2^x=144:9

2^x=16

2^x=2⁴

=>x=4

vậy x=4

\(a.\)\(\left(x^{54}\right)^2=x\)

\(\Leftrightarrow x^{108}=x\)

\(\Leftrightarrow x^{108}-x=0\)

\(\Leftrightarrow x.\left(x^{107}-1\right)=0\)

\(\Leftrightarrow\orbr{\begin{cases}x=0\\x^{107}-1=0\end{cases}}\)

\(\Leftrightarrow\orbr{\begin{cases}x=0\\x^{107}=1\end{cases}}\)

\(\Leftrightarrow\orbr{\begin{cases}x=0\\x=1\end{cases}}\)

\(b.\)\(2^{x+3}+2^x=144\)

\(\Leftrightarrow2^x.2^3+2^x.1=144\)

\(\Leftrightarrow2^x.\left(2^3+1\right)=144\)

\(\Leftrightarrow2^x.9=144\)

\(\Leftrightarrow2^x=144:9\)

\(\Leftrightarrow2^x=16\)

\(\Leftrightarrow2^x=2^4\)

\(\Leftrightarrow x=4\)

33-(-46) + (-32) - (+15)

= 33+46 -32 -15

=32

1 + (-4) + 7 (-10) + 13 + (-16) 

= -9

(-35) + 23 - (-35) - 47

=(-35)-(-35)+(23-47)

=0+(-24)=-24

Trả lời:

\(\left(-35\right)+23-\left(-35\right)-47\)

\(=\left(-35\right)+23+35-47\)

\(=\left[-35+35\right]+\left(23-47\right)\)

\(=0-24\)

\(=-24\)

Hok tốt!

Vuong Dong Yet

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