If [tex]\left[\begin{array}{c} 2a + b - 1 \\ 4 - b \end{array}\right] = \left[\begin{array}{c} 1 \\ 3 \end{array}\right][/tex], find the values of [tex]a[/tex] and [tex]b[/tex].



Answer :

Certainly! Let's solve the given system of equations step by step.

We start with the system of equations:

[tex]\[ \left[\begin{array}{c}2ab - 1 \\ 4 - b\end{array}\right] = \left[\begin{array}{c}1 \\ 3\end{array}\right] \][/tex]

This translates to two separate equations:

1. [tex]\(2ab - 1 = 1\)[/tex]
2. [tex]\(4 - b = 3\)[/tex]

Let's solve them one by one.

### Solving Equation 2: [tex]\(4 - b = 3\)[/tex]

Subtract 3 from both sides:
[tex]\[ 4 - b - 3 = 0 \][/tex]

This simplifies to:
[tex]\[ b = 1 \][/tex]

So, we have found:
[tex]\[ b = 1 \][/tex]

### Solving Equation 1: [tex]\(2ab - 1 = 1\)[/tex]

Substitute [tex]\(b = 1\)[/tex] into the equation [tex]\(2ab - 1 = 1\)[/tex]:

[tex]\[ 2a(1) - 1 = 1 \][/tex]

This simplifies to:
[tex]\[ 2a - 1 = 1 \][/tex]

Add 1 to both sides to isolate the term with [tex]\(a\)[/tex]:

[tex]\[ 2a - 1 + 1 = 1 + 1 \][/tex]

This further simplifies to:
[tex]\[ 2a = 2 \][/tex]

Now, divide both sides by 2:

[tex]\[ a = 1 \][/tex]

So, we have found:
[tex]\[ a = 1 \][/tex]

### Summary

The values of [tex]\(a\)[/tex] and [tex]\(\b\)[/tex] that satisfy both equations are:
[tex]\[ a = 1 \quad \text{and} \quad b = 1 \][/tex]

These are the required values that solve the given system of equations.