A linear equation is of the form

2x + 5 = 0

In linear equation

- We have = sign, since it is equation
- Highest power of x is 1

#### Is 2x + 3y + 4z = 5 a linear equation?

**
Yes
**

The equation has

- An = sign
- Highest power of x, y, z is 1

#### Is 3y + 100 = 0 a linear equation?

**
Yes
**

The equation has

- An = sign
- Highest power of y is 1

####
Is 3y
^{
2
}
+ 10y = 0 a linear equation?

**
No
**

Since the highest power of y is 2, it is not a linear equation

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