
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.




a: \(=-25\cdot4-27=-100-27=-127\)
b: \(=-65:\left(-13\right)-25\cdot4=5-100=-95\)
c: \(=100\cdot\left(-47\right)+53\cdot\left(-100\right)=100\cdot\left(-100\right)=-10000\)
d: \(=\left[\left(-3\right)^{13}:3^{10}-73\right]:\left(-5\right)^2-14\)
\(=\left(-100\right):25-14=-4-14=-18\)


a,3(x+1)+2x+5=28
\(\Rightarrow\)3x+3+2x+5=28
\(\Rightarrow\)5x+8=28
\(\Rightarrow\)5x=20
\(\Rightarrow\)x=4
b,3x-1=92
\(\Rightarrow\)3x-1=(32)2
\(\Rightarrow\)3x-1=34
\(\Rightarrow\)x-1=4
\(\Rightarrow\)x=5
c,3x+2+2.3x=99
\(\Rightarrow\)3x.9+2.3x=99
\(\Rightarrow\)11.3x=99
\(\Rightarrow\)3x=9
\(\Rightarrow\)3x=32
\(\Rightarrow\)x=2

a) 28 + 2x = 35 - (-13)
=> 28 + 2x = 48
=> 2x = 48 - 28
=> 2x = 20
=> x = 20 : 2
=> x = 10
Vậy x = 10
b) 2(x - 1)2 - 5 = 45
=> 2(x - 1)2 = 45 + 5
=> 2(x - 1)2 = 50
=> (x - 1)2 = 50 : 2
=> (x - 1)2 = 25
=> (x - 1)2 = 52
=> x - 1 = 5
=> x = 5 + 1
=> x = 6
Vậy x = 6
c) 20 - 3|x + 5| = -7
=> 3|x + 5| = 20 - (-7)
=> 3|x + 5| = 27
=> |x + 5| = 27 : 3
=> |x + 5| = 9
TH1: x + 5 = 9
=> x = 9 - 5
=> x = 4
TH2: x + 5 = -9
=> x = -9 - 5
=> x = -14
Vậy x = 4 hoặc x = -14
x = 1 hoặc x = 0
tick ủng hộ nhé !!
x28 = x5
=> x28 - x5 = 0
=> x5(x23 - 1) = 0
=> x5 = 0 => x = 0
hoặc x23 - 1 = 0 => x23 = 1 => x23 = 123 => x = 1
Vậy x = 0 ; x = 1