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Chapter 3: Q47. (page 133)

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

y 鈥� 21 = 鈥� 15

Short Answer

Expert verified

The solution is y=6

Step by step solution

01

Step-1 – Given

The given equation is y-21=-15.

02

Step-2 – To determine

We have to find the value of y.

03

Step-3 – Calculation

The given equation is:

y鈭�21=鈭�15writetheoriginalequationy鈭�21+21=鈭�15+21add21tobothsidesy=6simplify

To check we will substitute y=6 in left-hand-side of the equation. If left-hand-side equal right-hand-side then we can say that the solution is correct.

y鈭�21(Writeoriginalequation)6鈭�21(Substitutey=6)鈭�15(Simplify)

So, we see that, both sides are equal.

Therefore, the solution is y=6.

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n6>7
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