Question

(x –15) .15 = 0          b) 32 (x –10 ) = 32      

c) ( x – 5)(x – 7) = 0               d) (x – 35).35 = 35

Answer 1

a)(x-15)=0     

x=15

Vậy c=15

Answer 2

b)(x-10)=1

x=11

Vậy x=11

Answer 3

c)(x-5)(x-7)=0

x=5 hoặc x=7

Vậy \(x\in\left\{5;7\right\}\)

Answer 4

d)(x-35)=1

x=36

Vậy x=36

Answer 5

a, ⇒ x - 15 =0

    ⇒ x        = 15

b, ⇒ x - 10 = 1

   ⇒  x        = 11

c, \(\Rightarrow\left[{}\begin{matrix}x-5=0\\x-7=0\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=5\\x=7\end{matrix}\right.\)

d, ⇒ x - 35 = 1

    ⇒ x         = 36

Answer 6

\(\left(x-15\right).15=\)

\(\Rightarrow x-15=0\)

\(\Rightarrow x=15\)

\(\text{ 32 .(x –10 ) = 32 }\)

\(\Rightarrow x-10=1\)

\(\Rightarrow x=11\)

\(\text{( x – 5)(x – 7) = 0 }\)

\(\Rightarrow x-5=0\)

\(\Rightarrow x=5\)

\(\text{(x – 35).35 = 35}\)

\(\Rightarrow x-35=1\)

\(\Rightarrow x=36\)

Answer 7