Question

tìm x

a, 123-5(x*4)=38

Answer 1

a) \(123-5\left(x.4\right)=38\)

\(5\left(x.4\right)=123-38\)

\(5\left(x.4\right)=85\)

\(x.4=85:5\)

\(x.4=17\)

\(x=17:4\)

\(\Rightarrow x=4,25\)

Answer 2

a)123-5(x.4)=38

          5(x.4)=123-38

          5(x.4)=85

             x.4=85:5

             x.4=17

                x=? 

Answer 3

123-5(x.4)=38

5-(x.4)=123-38

5-(x.4)=85

x.4=85-5

x.4=80

x=80:4

x=20

nhớ k cho mình nhé

chúc bạn học tốt

Answer 4

ờ mà thì đề sai hay sao ấy

Answer 5

\(125-5\left(x\cdot4\right)=38\)

\(\Rightarrow-5\cdot\left(x\cdot4\right)=38-125\)

\(\Rightarrow-5\cdot\left(x\cdot4\right)=-87\)

\(\Rightarrow5\cdot\left(x\cdot4\right)=87\)

\(\Rightarrow x\cdot4=\frac{87}{5}\)

\(\Rightarrow x=\frac{87}{5}:4\)

\(\Rightarrow x=\frac{87}{20}\)

Answer 6

123 - 5( x . 4 ) = 38

5( x . 4 ) = 123 - 38

5( x . 4 ) = 85

x . 4 = 85 : 5

x . 4 = 17

x = 17 : 4

x = 17/4