(28.5x+5x+2).2=106
=>(28.5x+5x+2)=106:2=53
=>28.5x+5x = 53-2=51
<=>
(28.5x+5x+2).2=106
=>(28.5x+5x+2)=106:2=53
=>28.5x+5x = 53-2=51
<=>
tìm x biết :
a) 2^x+1 + 2^x+2 + 2^x+3 +...+ 2^x+99 = 2^106 -2^7
b) 3(x+6) = 2(x-5)
c) | 3x-7 | = 6
bài 1 tính
a, 24 x 66 - 24 + 36 x 24
b, 29 x 173 - 29 x 72 -29
c, 1+5+10+15+...+55+60
d, 1x2+2x3+3x4 +...+18x19+19x20
bài 2 tìm x
a,106- ( x+ 7) =9
b, 2 x ( x+ 4) + 5 =65
c, (16x x -32) x 45=0
d, x+4 x x = 100 : 5
Bài toán: Tìm x ∈ N, biết: 5x : 52 = 625
tìm x biết
a) x.(x+1)<0
b) (x+1).(x+2)>0
c) 2^x+1 + 2^x+2 + 2^x+3 + ... + 2^x+99 = 2^106 - 2^7
d) 3.(x+6) = 2.(x-5)
e) | 3x-7 | =6
tìm x
a) 25 + 3 . ( x - 7) = 106
b) 32 . ( x + 4 ) - 52 = 5 . 22
c) 4 . ( x - 3 ) = 72 - 110
Tìm X
2^4.x-3 + 74 = 106
tìm x
a) 135-5(x+4)=35
b) 25+3(x-8)=106
c) 32(x+4)-52=5.22
d) 5x + x =39-311:39
e) 7x - x = 521:519+3.22-70
102+(26-3.x):5=106
Tìm x
Tìm số nguyên x, biết:
a) x – 32 = − 5 − 17
b) 16 – x = 21 – − 8
c) 106 − x = − 58 – 8