-12(x-5)+7(3-x)=5
=> -12x+60+21-7x=5
=> -19x+81=5
=> -19x=5-81
=> -19x=-76
=> x=(-76):(-19)
=> x=4
-12(x-5)+7(3-x)=5
-12x+60+21-7x=5
-19x+81=5
-19x=5-81
-19x=-76
x=-76:(-19)
x=4
{x + 2 } - 2=0 {x + 3}+1 =7
{x + 3 } + 4 = 12 {5x + 4} - 1= 13
{ 4x - 8 } + 3 =12 3 + {x - 5 } = 14
-12(x-5)+7(x-3)=5 va (5x+335):x=72
Tìm STN x, biết
1) (x + 2) - 2 = 0 2) (x + 3) + 1 = 7
3) (3x - 4) + 4 = 12 4) (5x + 4) - 1 = 13
5) (4x - 8) - 3 = 5 6) 3 + (x - 5) = 7
7) 8 - (2x - 4) = 2 8) 7 + (5x + 2) = 14
9) 5 - (3x - 11) = 1 10) 16 - (8x + 2) = 6
Tìm x
a) ( x + 7 ) - 25 = 135x + 2x =6^5 - 5^0
b) 5x + x = 150 : 2 + 3
c) 6x + x = 5^11 : 5^9 + 3^1
d) 5x + 3x = 3^6 : 3^3 . 4 + 12
bài 1 : tìm x biết
a, 100-7.(x-5)=65
b, 12.(x-3):3=64+8
c, 26+5x =125:5
d, 5x-201=2.2.2.2.2
Tìm số tự nhiên x biết:
(x+2)-2=0
(x+3)+1=7
(3x-4)+4=12
(5x+4)-1=13
(4x-8)-3=5
8-(2x-4)=2
7+(5x+2)=14
5-(3x-11)=1
Giúp e vs ạ(Vui lòng trình bày ạ)
Rút gọn biểu thức
A= -(3x+7)+(5x-2)+(2x-10)
B= (6x+8)-(4x-5)-3x
C= 2.(5x+3)-(2x-1)+12
D=(x+7)-3.(x+1)+2x-5
Tìm x
a,3.(2x+8)-5x+2=0
b,5.(7-3x)+7.(2+2x)=0
c,-12.(x-5)+7.(3-x)=5
d,30.(x+2)-6.(x-5)-24x=100
tìm x
a](x6 và2/7+3/7)2 và1/5-3/7=5
b) x:4/13-x:6/7-1 và2/3=17/12
c) 1/3x+2/5x-2/5=0
