\(-\left(35-2x\right)-\left(7-x\right)=4x-15\)
=> \(-35+2x-7+x==4x-15\)
=> \(-42+3x=4x-15\)
=> \(-42+15=4x-3x\)
=> \(x=-27\)
\(-\left(35-2x\right)-\left(7-x\right)=4x-15\)
\(-35+2x-7+x=4x-15\)
\(-42+3x=4x-15\)
\(-42+3x-4x+15=0\)
\(-27-x=0\Leftrightarrow x=-27\)
Bài 1: Tìm x
a) 5x - 7 = -19 + 2x
b) 35- 3x= 45 - 4x
c) 4x - 15 = - 75 - x
d) x - 12 = ( - 9 ) - 15
Bài 2 : Tìm x
a) 11- ( 15 + 14 ) = x - ( 25 - 9 )
b) 4x - 6 = - 20 + 3x
c) 45 - 2x = 55 - 5x
d) 6x - 15 =- 55 - 2x
Giúp mình với
bài 1 : tìm x, biết :
a, \(5^{x+7}=125\)
b, \(7^{-10-x}+1=50\)
c, \(4x-3x=-45+35\)
d, \(2x+4x=-5,6\)
e, \(2x+7=3x+10\)
f, \(-15+2x=3x+9\)
Tìm x, biết:
a) 4 x + 18 : 2 = 13
b) 2 x - 2 0 = 3 5 : 3 3
c) 48 - 3 ( x + 5 ) = 24
d) ( 15 + x ) : 3 = 3 15 : 3 12
Tìm x, biết:
a, 4x+18:2 = 13
b, 48 – 3(x+5) = 24
c, 2 x - 2 0 = 3 5 : 3 3
d, (15+x):3 = 3 15 : 3 12
17(5-2x)-3(4x+1)-5x=-9
35-(x-7)=-7-(27-8)
17(5-2x)-3(4x+1-5x=-9
35-(x-7)=-7-(-27)+3x
tìm x,biết
5-x-16=40+x
4x-10=15-x
15-x=4x-5
x-15=6+4x
-12+x=5x-20
7x-4=20+3x
5x-7=-21-2x
x+15=20-4x
17-x=7-6x
1. tìm x :
a) 2( x + 15 ) - 7 - x = 15 + 2x
b) - ( x + 7 ) + 2( 5 -x ) = 4x + 15
a) 42-x=5
b) 15.(x+4)=75
c) 27+3x=9^8.9^7
d) x+18=12
e) 2x-15=-19
f) 36 :(x^3-12)=-3
g)x+15=35
h) 2x-13=3^2
