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A linear equation in 2 variables is like

3x + 4y = 10

It has

- An equal sign =
- Highest power is 1
- Two variables - x & y

#### Is 3y + 4z = 80 a linear equation in two variable?

**
Yes,
**

It has

- An equal sign =
- Highest power is 1
- Two variable - x & y

#### Is 3x + 4y + 5z = 50 a linear equation in two variable?

**
No
**

It has 3 variables - x, y, z.

But in linear equation in two variables, we have 2 variables.

#### Is 2x + 5 = 0 a linear equation in two variable?

**
No
**

It has 1 variable - x

But in linear equation in two variables, we have 2 variables.