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Question 2 (5 points)

(02.01 LC)
2x - 10
Solve:
= Bx (5 points)
-10
Ob
-1
Ос
2
Od
11

Question 2 (5 points) (02.01 LC) 2x - 10 Solve: = Bx (5 points) -10 Ob -1 Ос 2 Od-example-1
User Benxamin
by
8.0k points

1 Answer

3 votes

Answer:

B. -1

General Formulas and Concepts:

Pre-Algebra

  • Order of Operations: BPEMDAS
  • Equality Properties

Explanation:

Step 1: Define


(2x-10)/(4) =3x

Step 2: Solve for x

  1. Multiply 4 on both sides:
    2x-10=12x
  2. Subtract 2x on both sides:
    -10=10x
  3. Divide 10 on both sides:
    -1=x
  4. Rewrite:
    x=-1

Step 3: Check

Plug in x into the original equation to verify it's a solution.

  1. Substitute in x:
    (2(-1)-10)/(4) =3(-1)
  2. Multiply:
    (-2-10)/(4) =-3
  3. Subtract:
    (-12)/(4) =-3
  4. Divide:
    -3 =-3

Here we see that -3 does indeed equal -3.

∴ x = -1 is a solution of the equation.

User Oscar Fanelli
by
8.5k points

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