Question

*Which of the following is not an equation in one variable ?*

1️⃣ 2x + 5=9
2️⃣ 3y=8
3️⃣ 3x + 4y =9
4️⃣ 6z/7=2​

Answer 1

Answer:

1 x+5=9/2

x=9/2-5

2 y=8/3

3 I don't know

4 6z/7=2

6z= 2×7

z=14/6

Step-by-step explanation:

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Answer 2

Given : Equations :

To Find ; Which of the following is not an equation in one variable

1️⃣ 2x + 5=9

2️⃣ 3y=8

3️⃣ 3x + 4y =9

4️⃣ 6z/7=2​

Solution:

1️⃣ 2x + 5=9

Only one variable x

2️⃣ 3y=8

Only one variable x

3️⃣ 3x + 4y =9

Two variables x & y

Hence 3x + 4y =9 is not an equation in one variable

4️⃣ 6z/7=2​

Only one variable x

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