Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\left(2x+1\right):7=2^2+3^2 \)
\(\Leftrightarrow\left(2x+1\right):7=13\)
\(\Leftrightarrow2x+1=13.7\)
\(\Leftrightarrow2x+1=91\)
\(\Leftrightarrow2x=90\)
\(\Leftrightarrow x=45\)
\(400-x.3=100\)
\(\Leftrightarrow-x.3=400-100\)
\(\Leftrightarrow-x.3=300\)
\(\Leftrightarrow-x=300:3\)
\(\Leftrightarrow x=100\)
\(96-3\left(x+8\right)=42\)
\(\Leftrightarrow3\left(x+8\right)=96-42\)
\(\Leftrightarrow3\left(x+8\right)=54\)
\(\Leftrightarrow x+8=54:3\)
\(\Leftrightarrow x+8=18\)
\(\Leftrightarrow x=10\)
\(15.5\left(x-35\right)-525=0\)
\(\Leftrightarrow75\left(x-35\right)-525=0\)
\(\Leftrightarrow75\left(x-35\right)=525\)
\(\Leftrightarrow75x-2625=525\)
\(\Leftrightarrow75x=525+5625\)
\(\Leftrightarrow75x=3150\)
\(\Leftrightarrow x=42\)
- Chúc bạn làm bài tốt !
a. \(\left|-4\right|^{200}=4^{200}=\left(2^2\right)^{200}=2^{400}\)
\(\left(-3\right)^{400}=3^{400}\)
Vì 2400 < 3400 nên \(\left|-4\right|^{200}<\left(-3\right)^{400}.\)
b. Vì -7 > -23 và a = a nên -7.a > -23.a
c. Vì a + 5 = a + 5 và 8 > -42 nên (a + 5).8 > (a + 5).(-42)
a) 7x - 8 = 713
7x = 713 + 8
7x = 721
x = 721 : 7
x = 103
b) 8 ( x - 3 ) = 0
x - 3 = 0 : 8
x - 3 = 0
x = 0 + 3
x = 3
c) 4x : 17 = 0
4x = 0 . 17
4x = 0
x = 0 : 4
x = 0
d) 96 - 3 ( x + 1 ) = 42
3 ( x + 1 ) = 96 - 42
3 ( x + 1 ) = 54
x + 1 = 18
x = 17
a )531 + ( 218 - x ) = 735
218 - x = 735 - 531
218 - x = 204
x = 218 - 204
x = 14
a ) 541 + ( 218 - x ) = 735
218 - x = 735 - 541
218 - x = 194
x = 218 - 194
x = 24
b,\(96-3\left(x+1\right)=42\Rightarrow96-42=3\left(x+1\right)\Rightarrow54=3\left(x+1\right)\Rightarrow x+1=54\div3=18\Rightarrow x=18-1=17\)
d,\(\left[178-\left(13x-8\right)\right]\cdot53=5724\Rightarrow178-\left(13x-8\right)=5724\div53=108\Rightarrow178-108=13x-8\Rightarrow13x-8=70\Rightarrow13x=70+8=78\Rightarrow x=78\div13=6\)
5x= 400 - 200
5x= 200
x= 200 : 5
x= 40
96-3(x+8)=42
3(x+8)= 96 - 42
3(x+8)= 54
x+8=54 : 3
x+8= 18
x=18 - 8
x= 10
5x= 400 - 200
5x= 200
x= 200 : 5
x= 40
96-3(x+8)=42
3(x+8)= 96 - 42
3(x+8)= 54
x+8=54 : 3
x+8= 18
x=18 - 8
x= 10