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Answers
Answer:
Zn(s) + 2AgNO3(s) → Zn(NO3)2 + 2Ag
Answer:
AnsWer :
x = - 1/5.
y = 12/5.
Solution :
We have, Pair of Linear Equation.
Let,
\tt \dagger \: \: \: \: \: 3x + y = 7. \: \: \: \: \: - (1)†3x+y=7.−(1)
\tt \dagger \: \: \: \: \: x + 2y = 2. \: \: \: \: \: - (2)†x+2y=2.−(2)
★ Let Apply Substitution Method.
Taking Equation, ( 2 )
\tt : \implies x + 2y = 2.:⟹x+2y=2.
\tt \dagger \: \: \: \: \: x = 2 - 2y \: \: \: \: \: - (3)†x=2−2y−(3)
Now, Putting the value of x In Equation ( 1 )
\tt : \implies 3x + y = 7.:⟹3x+y=7.
\tt : \implies 3 \times (2 - 2y) + y = 7.:⟹3×(2−2y)+y=7.
\tt : \implies 6 - 6y + y = 7.:⟹6−6y+y=7.
\tt : \implies - 5y = 7 - 6.:⟹−5y=7−6.
\tt : \implies y = \dfrac{ - 1}{5}.:⟹y=
5
−1
.
Now, Putting the value of y in Equation ( 3 ) We get.
\tt : \implies x = 2 - 2y.:⟹x=2−2y.
\tt : \implies x = 2 - 2 \times ( \dfrac{ - 1}{5}) .:⟹x=2−2×(
5
−1
).
\tt : \implies x = 2 + \dfrac{2}{5}.:⟹x=2+
5
2
.
\tt : \implies x = \dfrac{10 + 2}{5} .:⟹x=
5
10+2
.
\tt : \implies x = \dfrac{12}{5} .:⟹x=
5
12
.
Therefore, the value of x is -1/5 and y = 12/5.