Question

51+ ( 65 - 3 x y ) : 5 =  61

Answer 1

Lời giải:

$51+(65-3\times y):5=61$

$(65-3\times y):5=61-51=10$

$65-3\times y=10\times 5=50$

$3\times y=65-50=15$

$y=15:3=5$

Answer 2

=>(65-3y):5=10

=>65-3y=15

=>3y=50

=>y=50/3

Answer 3

\(51+\left(65-3\cdot y\right):5=61\)

\(\Rightarrow\left(65-3\cdot y\right):5=61-51\)

\(\Rightarrow\left(65-3\cdot y\right):5=10\)

\(\Rightarrow65-3\cdot y=10\cdot5\)

\(\Rightarrow65-3\cdot y=50\)

\(\Rightarrow3\cdot y=65-50\)

\(\Rightarrow3\cdot y=15\)

\(\Rightarrow y=\dfrac{15}{3}\)

\(\Rightarrow y=5\)