2x-123+x=12
=> x.(2-1)-123=12
=>x-123=12
=>x=12+123
=>x=135
2x-123+x=12
=> 3x-123=12
=> 3x=12+123
=> 3x=135
=> x=135:3
=> x=45
2x - 123 + x = 12
2x + x = 123 + 12
3x = 135
x = 135 : 3
x = 45
2x-123+x=12
=> x.(2-1)-123=12
=>x-123=12
=>x=12+123
=>x=135
2x-123+x=12
=> 3x-123=12
=> 3x=12+123
=> 3x=135
=> x=135:3
=> x=45
2x - 123 + x = 12
2x + x = 123 + 12
3x = 135
x = 135 : 3
x = 45
Tim X
3) -12 + (2x – 9) + x= 0
4) 11 + (15 - x) = 1
5) 4 - (27 - 3) = x - (13 - 4)
6) 8 - (x - 10) = 23 - (- 4 +12)
7) 105 – 5(10 – 5x) = -20
8) (x -1)(8-2x)(3x+123) = 0
9) (x2 - 25)(x+ 10) = 0
10) x(x2+5) =
tìm x
2x - 60 : 3 =12
tim x: x+123<246
tim x
2193 : {[( 2223 -18x ) : 135 ] +123} + 1996= 2013
Cau 3 (2 diem). Tim so tu nhien x, biet:
a. 123 - x =38
b. (x+15) - 7 =33
c. 3x+3 - 13=230
Tính :
a) 645 - ( 27 + x ) - 342 = 123
b) ! x ! + 87 = 123
c) ! x - 12 ! = 42
1) tim x
a) 5- ( 17-3 ) = x - ( 2 - 15 )
b) 12x + 19x -123 = 280
tìm X biết
a) x-12= - 15
b) 123-5.(x+4)=38
a.X-12=15
b.123-5(x+4)=48