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Chapter 3: Q. 45E (page 133)

Algebra Basics Solve the equation. Check your solution. (Lesson 2.5)

d + 9 = - 12

Short Answer

Expert verified

The solution is d=鈭�21.

Step by step solution

01

Step-1 – Given

The given equation isd+9=鈭�12 .

02

Step-2 – To determine

We have to find the value of d.

03

Step-3 – Calculation

The given equation is:

d+9=鈭�12writetheoriginalequationd+9+12=鈭�12+12add12tobothsidesd=鈭�21simplify

To check we will substitute d=鈭�21 in left-hand-side of the equation. If left-hand-side equal right-hand-side then we can say that the solution is correct.

d+9(Writeoriginalequation)鈭�21+9(Substituted=鈭�21)鈭�12(Simplify)

So, we see that, both sides are equal.

Therefore, the solution is d=鈭�21.

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