Question

Giúp mình với mai mình phải thi rồi!!!!!!

a ) (x + 2) . 5 = 50

b ) ( 28 + x ) - 3 = 3¹⁰ : 3⁷

Answer 1

a. (x + 2).5=50

x+2=50:5

x+2=10

x=10:2

x=5

b, (28+x) -3=3^10:3^7

(28+x) -3=3^3

(28+x) -3=27

28+x=27+3

28+x=30

x=30-28

x=2

Answer 2

^là mũ nha

Answer 3

a) x+2=\(\frac{50}{5}\)=10

⇒x=10-2=8

b)28+x-3=3^10-7=3³=27

25+x=27

x=2

Answer 4

a ) (x + 2) . 5 = 50

(x + 2) = 50 : 5

x + 2 = 10

x = 10 - 2

➩ x = 8

b ) (28 + x) - 3 = 3¹⁰ : 3⁷

(28 + x) - 3 = 3³

(28 + x) - 3 = 27

28 + x = 27 + 3

28 + x = 30

x = 30 - 28

➩ x = 2

Answer 5

a) Ta có: \(\left(x+2\right)\cdot5=50\)

\(\Leftrightarrow x+2=10\)

hay x=8

Vậy: x=8

b) Ta có: \(\left(28+x\right)-3=3^{10}:3^7\)

\(\Leftrightarrow28+x=3^3-3=24\)

hay x=-4

Vậy: x=-4

Answer 6

chỉ ghi kết quả: a) 10 b) 2

Answer 7

a) (x+2).5=50

x+2=50:5

x+2=10

x=10-2

x=8.

Vậy x=8.

b) (28+x)-3=3¹⁰:3⁷

(28+x)-3=3³

(28+x)-3=27

28+x=27+3

28+x=30

x=30-28

x=2.

Vậy x=2.