Question

Tìm x:

0,8 x X = 90 - 40,6.               210 : X = 14,92 - 6,52

 

Answer 1

\(0,8\times x=90-40,6\)
\(\Rightarrow0,8\times x=49,4\)
\(\Rightarrow x=49,4:0,8\)
\(\Rightarrow x=61,75\)

\(210:x=14,92-6,52\)
\(\Rightarrow210:x=8,4\)
\(\Rightarrow x=210:8,4\)
\(\Rightarrow x=25\)

Answer 2

\(0,8\times x=90-40,6\\ \Rightarrow0,8\times x=49,4\\ \Rightarrow x=49,4:0,8\\ \Rightarrow x=61,75 \\ b,210:x=14,92-6,52\\ \Rightarrow210:x=8,4\\ \Rightarrow x=210:8,4\\ \Rightarrow x=25\)

Answer 3

0,8 x X = 90 - 40.6

= 0,8 x X = 49,4

= 49,4 : 0,8

= 61,75

210 : X = 14,92 - 6,52

= 210 : X = 8,4

= 210 : 8,4

= 25

Answer 4

a)

$0,8\times x=90-40,6$
$\Rightarrow 0,8\times x=49,4$
$\Rightarrow x=49,4:0,8$
$\Rightarrow x=61,75$
$210:x=14,92-6,52$
$\Rightarrow 210:x=8,4$
$\Rightarrow x=210:8,4$
$\Rightarrow x=25$

Answer 5

0,8 x X = 90 - 40,6

\(0,8\times x=49,4\\ \Rightarrow x=61,75\\ \).      

210 : X = 14,92 - 6,52

\(210\div x=8,4\\ \Rightarrow x=25\)