(26 - 2x) 5 = 100
Tìm x :
2x + 26 = 26 + 100
ai k mik mik k lại
2x+26=26+100
2x+26=260
2x=260-26
2x=100
x=100:2
x=50
bn k mik nha
2x + 26 = 26 + 100
2x + 26 = 126
2x = 126 - 26
2x = 100
x = 50
ai k cho tớ
tớ k lại cho. ko lừa ai đâu
2x + 26 = 26 + 100
2x + 26 = 126
2x = 126 - 26
2x = 100
x = 100 : 2
x = 50
k cho mk nha
mk dang bi am diem
Tìm x biết
a)3.5x+1- 100 = - 25
b)4x-26+2x=28
\(a,3.5^{x+1}-100=-25\\ 3.5^{x+1}=-25+100\\ 3.5^{x+1}=75\\ 5^{x+1}=75:3\\ 5^{x+1}=25\\ 2^{x+1}=5^2\\ x+1=2\\ x=2-1\\ x=1\)
\(b,4x-26+2x=28\\ 4x+2x-26\\ 6x-26=28\\ 6x=28+26\\ 6x=54\\ x=54:6\\ x=9\)
Giúp tui nhanh chiều thi rồi!!!
(5^100 - 5^101 - 5^100) : (5^99 x 26 - 5^99)
Tìm x biết:
a, (x+1)+(x+2)+...+(x+199)=0
b, (x=30)+(x-29)+(x-28)=11
c, x+(x-1)+(x-2)+...+(x-100)=0
d, 123-3.(x+4)=23
e, [(14x+26).3+55] : 5 =35
f, 720:[41-(2x-5)]= 23.5
g, (2x-4).(48-12x)2=0
h, (3-x).(4-2x).(x+10)=0
i, |x-7|+13=25
k, |x-3|-16=-4
l, 26-|x+9|=-13
Giúp mk nha!
a, ( x + 1 ) + ( x + 2 ) + ... + ( x + 199 ) = 0
x + 1 + x + 2 + ... + x + 199 = 0
( x + x + ... + x ) + ( 1 + 2 + ... + 199 ) = 0
199x + 19900 = 0
199x = 0 - 19900
199x = -19900
x = -19900 : 199
x = -100
Vậy ...
b, ( x - 30 ) + ( x - 29 ) + ( x - 28 ) = 11
x - 30 + x - 29 + x - 28 = 11
( x + x + x ) - ( 30 + 29 + 28 ) = 11
3x - 87 = 11
3x = 11 + 87
3x = 98
x = \(\frac{98}{3}\)
Vậy ...
123 - 3 ( x + 4 ) = 23
3 ( x + 4 ) = 123 - 23
3 ( x + 4 ) = 100
x + 4 = \(\frac{100}{3}\)
x = \(\frac{100}{3}-4\)
x = \(\frac{88}{3}\)
Vậy ...
2x(x-5)-x(3+2x)=26
\(2x^2-10x-3x-2x^2-26=0\)
\(-13x-26=0\)
\(x=-2\)
2x2−10x−3x−2x2−26=02x2−10x−3x−2x2−26=0
13x−26=0−13x−26=0
x=−2
\(\Leftrightarrow2x^2-10x-3x-2x^2=26\)
hay x=-2
2x(x+5)+x(3-2x)=26
`2x^2 + 10x + 3x - 2x^2 = 26`
`<=> 13x = 26`
`<=> x = 2`
2x(x-5)-x(3x+2x)=26
2x(x-5)-x(2x+6)=26
2x(x-5)-x(2x+6)=26
<=>2x2-10x-2x2-6x=26
<=>-16x=26
<=>x=-13/8
Tìm x, biết: 2x(x – 5) – x(3 + 2x) = 26.
Ta có: 2x(x – 5) – x(3 + 2x) = 26
⇔ 2 x 2 – 10x – 3x – 2 x 2 =26
⇔ - 13x = 26
⇔ x = - 2