Question

Tìm số tự nhiên x, biết:

a) 2 . x - 138 = 2^{3 .} 3²:                                  b) 231 - (x - 6) = 1339 : 13

Answer 1

a)2.x-138=2^3.3^2

2x-138=72

2x=72+138

2x=210

x=210:2=105

b)231-(x-6)=1339:13

231-(x-6)=103

x-6=231-103

x-6=128

x=128+6

x=134

Answer 2

cám ơn nha

Answer 3

a) \(2x-138=2^3\cdot3^2\)

\(2x-138=72\)

\(2x=72+138=210\)

\(x=\frac{210}{2}=105\)

b) \(231-\left(x-6\right)=1339:13\)\

\(231-\left(x-6\right)=103\)

\(x-6=231-103=128\)

\(x=128+6=134\)

Answer 4

Good morning, Miss Angela

Answer 5

Good morning, Miss Angela