34 - (x + 68) = 23 . 30
34 - (x + 68) = 8 . 1
34 - (x + 68) = 8
x + 68 = 34 - 8
x + 68 = 26
x = 26 - 68
x = -42
2x - 1 + 3 = 4
2x - 1 =4 - 3
2x - 1 = 1
2x = 1 + 1
2x = 2
2x = 21
Vậy x = 1
mik nhah nhất nha
a) 34 - ( x + 68 ) = 2 ^ 3 x 3 ^ 0
34 - ( x + 68 ) = 8 x 1
34 - ( x + 68 ) = 8
x +68 = 34 - 8
x + 68 = 26
x = 26 - 68
x = -42
Vậy x =-42
2 ^ x - 1 + 3 = 4
2 ^ x - 1 + 3 = 2 ^ 2
=> x - 1 + 3 = 2
x - 1 = 2 - 3
x - 1 = - 1
x = - 1 + 1
x = 0
Vậy x = 0
34-[x+68]=8 2^x-1+3=4
x+68=34-8 2^x-1=4+3
x+68=26 2^x-1=7
x=26-68 2^x=7+1
x=-42 2^x=8
2^x=2^3
x=3