Question

Solve the following equation by trial and error method
1. 4x-1=7
​

Answer 1

Given Equation:

4x - 1 = 7

To Find:

The value of x by using the trial and error method.

Explanation:

By putting the value of x as 0, we get

4(0) - 1 = 7

0 - 1 = 7

-1 ≠ 7

So, the value of x is not 0 .

By putting the value of x as 1, we get

4(1) - 1 = 7

4 - 1 = 7

3 ≠ 7

So, the value of x is not 1.

By putting the value of x as 2, we get

4(2) - 1 = 7

7 = 7

The value of x is 2.

Answer:

By using the trial and error method, we got that the value of x is 2.

Answer 2

Step-by-step explanation:

$\sf \: assuming \: the \: vale \: of \: x \: as \: 1 \\ = = > 4x - 1 = 7 \\ = = > 4(1) = 8 \\ = = > 4 \: \cancel= \: 8 \\ \sf again \: assuming \: the \: value \: of \: x \: as \: 2\\ = = > 4(2) - 1 = 7 \\ = = > 8 - 1 = 7 \\ = = > 7 = 7 \: ans . \bf \green{satisfied}$