Answer :

To solve the equation [tex]\(90 = 141 + a\)[/tex], we need to find the value of [tex]\(a\)[/tex].

1. Start with the given equation:
[tex]\[
90 = 141 + a
\][/tex]

2. Isolate [tex]\(a\)[/tex] on one side of the equation:

To do this, subtract 141 from both sides of the equation. This helps to get [tex]\(a\)[/tex] by itself.

[tex]\[
90 - 141 = a
\][/tex]

3. Perform the subtraction:

Subtract 141 from 90.

[tex]\[
90 - 141 = -51
\][/tex]

4. Solution:

The value of [tex]\(a\)[/tex] is [tex]\(-51\)[/tex].

Therefore, the solution to the equation [tex]\(90 = 141 + a\)[/tex] is [tex]\(a = -51\)[/tex].