75 * (3x-23) = 74 * 72
3x -23 = 74 * 72 : 75
3x -23 = 7
3x = 7 - 8
3x = -1
x = \(\frac{-1}{3}\)
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Thực hiện phép tính:
1,-4/7 + 2/3x -9/14
2,17/13 - ( 4/13 - 11 )
3, 8 2/7 - ( 3 4/9 + 4 2/7 )
5, ( 2/3 - 1 1/2): 4/3 + 1/2
6, -5/13 + 2/5 + -8/13 + 3/5 - 3/7
7, 6/5 x 3/7 + 6/5 : 7/10 + 6/5
1) 1 và 1/2 + x = 3/2 - 7
2) 1/4 + 1/3 : 3x = -5
3) 4/5 . x = 8/35
4) 2/3x - 1/4 = 7/1
5) 3/5x + 1/2 = 1/7
6) 1 - (5 và 3/8 + x - 7 và 5/24 ) : ( -16 . 2/3 ) = 0
Tính :
1) 4(3x+4)
2) 4/3(5/3x+6)
3)(4/3x+7).5+2
4)(3/7x-6).(-7)+3x
tìm x thuộc Z biết :
a)|3x+5|-2(x+7)-4(7-x)=|3x+5|+2x
b)|x^2-4|+(x-2)^2=0
c)|x+7|+|x+5|+|x+3|=2x
d)|3x+5|=5-3x
GIÚP MÌNH VỚI Ạ!
a) 4/9 + 4/3x = 7/9
b) (5/2 - x).(-4/7) = 9/14
c) 3x + 3/4 = 2\(\frac{2}{3}\)
d) -5/6 - x = 7/12 + -1/3
CÁC BẠN NÀO GIÚP ĐƯỢC THÌ MIK CẢM ƠN Ạ !!!
1) 7. (3x+5)+2.(7x+14)98. 2) 4. (x -5)+3.(x+7)22
3) 5.(4-x) +7.(x-2)24. 4) 3.(x -5)+6.(x+3)12
5) 4-x+5.(x+2)38. 6) 5.( x-3)+2.(x+8)22
7) 5.(x-7)+10.(4+x)20. 8) 4.(x+10)+8.(x-3)24
9) 4.(5-x)+5.(x-2)15. 10) 4.(x-1)+3.(x-2)-1
Đọc tiếp
1) 7. (3x+5)+2.(7x+14)=98. 2) 4. (x -5)+3.(x+7)=22
3) 5.(4-x) +7.(x-2)=24. 4) 3.(x -5)+6.(x+3)=12
5) 4-x+5.(x+2)=38. 6) 5.( x-3)+2.(x+8)=22
7) 5.(x-7)+10.(4+x)=20. 8) 4.(x+10)+8.(x-3)=24
9) 4.(5-x)+5.(x-2)=15. 10) 4.(x-1)+3.(x-2)=-1
Bài 1:a)-2x-3.( x-17 ) 34-2.( -x+25 )b)17x+3.( -16x-37 ) 2x+43-4xc){-3x+2. [ 45-x-3 ( 3x+7 ) -2x]+4x} 55g)-103-57: [ 5.( 2x-1 )2-( -9 )0 ]Bài 2:a)-5.( -x+7 )-3.( -x-5 )-4.( 12-x )+48b)7.( -x-7 )-4.( -2x-11 )7.( 4x+10 )+9c)-2.( 15-3x )-4.( -7x+8 )-5-9.( -2x+1 )d)5.( -3x-7 )-4.( -2x-11 )7.( 4x+10 )+9e)4( x-2 )2-13( -3 )2.2-11.( -3 )f)-52-( 2x-1 )3( -13 ).( -3 )
Đọc tiếp
Bài 1:
a)-2x-3.( x-17 )= 34-2.( -x+25 )
b)17x+3.( -16x-37 )= 2x+43-4x
c){-3x+2. [ 45-x-3 ( 3x+7 ) -2x]+4x} = 55
g)-103-57: [ 5.( 2x-1 )2-( -9 )0 ]
Bài 2:
a)-5.( -x+7 )-3.( -x-5 )=-4.( 12-x )+48
b)7.( -x-7 )-4.( -2x-11 )=7.( 4x+10 )+9
c)-2.( 15-3x )-4.( -7x+8 )=-5-9.( -2x+1 )
d)5.( -3x-7 )-4.( -2x-11 )=7.( 4x+10 )+9
e)4( x-2 )2-13=( -3 )2.2-11.( -3 )
f)-52-( 2x-1 )3=( -13 ).( -3 )
1/4 1/3 : 3x = -5
4/5 . x = 8/35
2/3x - 1/4 = 7/12
3/5 x + 1/2 = 1/7
1 - ( 5 và 3/8 + x - 7 và 5/24 ) : - 16 VÀ 2/3 ) =0
Tìm x
a,-5×(-x+7)-3×(-x-5)=-4×(12-x)+48
b,-2×(15-3x)-4×(-7x+8)=,-5-9×(-2x+1)
c,7×(-x-7)-5×(-x-3)=12×(3-x)
d,5×(-3x-7)-4×(-2x-11)=7×(4x+10)+9