He lives on Hai Ba Trung Street.
@Đỗ Hàn Thục Nhi

a, 12⁷ : 6⁷ = (12 : 6)⁷ = 3⁷
b, 18³ : 9³ = (18 : 9)³ = 2³
c, 27⁵ : 81³ = (3³)⁵ : (3⁴)³ = 3¹⁵ : 3¹² = 3³
d, 125³ : 25⁴ = (5³)³ : (5²)⁴ = 5⁹ : 5⁸ = 5
@Ribi Shchi

6³ - (3.2⁵) = 216 - (3.32) = 216 - 96 = 120
@Hoàng Trần Minh Hy

a, 4¹⁰.2³⁰ = (2²)¹⁰.2³⁰ = 2²⁰.2³⁰ = 2⁵⁰
b, 9²⁵.27⁴.81³ = (3²)²⁵.(3³)⁴.(3⁴)³ = 3⁵⁰.3¹².3¹² = 3⁷⁴
c, 25⁵⁰.125⁵ = (5²)⁵⁰.(5³)⁵ = 5¹⁰⁰.5¹⁵ = 5¹¹⁵
d, 64³.4⁸.16⁴ = (2⁶)³.(2²)⁸.(2⁴)⁴ = 2¹⁸.2¹⁶.2¹⁶ = 2⁵⁰
e, 3⁸ : 3⁶ = 3²
2¹⁰ : 8³ = 2¹⁰ : (2³)³ = 2¹⁰ : 2⁹ = 2
12⁷ : 6⁷ = (12 : 6)⁷ = 2⁷
@Dương Tuyết Mai

541 + (218 - x ) = 735
<=> 218 - x = 194
<=> x = 24
@Van Dong Pham

10(17 - x) - 64 = 36
<=> 10(17 - x) = 100
<=> 17 - x = 10
<=> x = 7
@Van Dong Pham

5(x + 35) = 515
<=> x + 35 = 103
<=> x = 68
@Van Dong Pham

96 - 3(x + 1) = 42
<=> 3(x + 1) = 54
<=> x + 1 = 18
<=> x = 17
@Van Dong Pham

12x - 33 = 3².3
<=> 12x - 33 = 27
<=> 12x = 60
<=> x = 5
@Van Dong Pham

b, A = {0; 1; 3; 7; 15}
@Thảo Nguyên