As per linear equation, the solution of the given equation is x = 5.
A linear equation represents an equation that has one or multiple variables with the highest power of the variable is 1.
The given equation is:
3[- 3x + 9] = - 18
⇒ 3 × 3(- x + 3) = - 18
⇒ 9(- x + 3) = - 18
⇒ (- x + 3) = - 2
⇒ x - 3 = 2
⇒ x = 5
Learn more about linear equation here: https://brainly.com/question/1451905
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