Math Problem Statement

1. Determine whether each of the following is true and circle your answer. 2. Match the equations on the left with their solutions on the right.

Solution

Let's go through the questions from the image.

Part 1: True/False Statements

  1. Determine whether each of the following is true and circle your answer:

    (a) 2x+3=52x + 3 = 5 is an equation.
    Answer: True. This is a linear equation in one variable xx.

    (b) 3y+23y + 2 is an equation.
    Answer: False. This is not an equation because it lacks an equals sign. It’s an expression.

    (c) If c=8c = 8, then 3c=383c = 38.
    Answer: False. If c=8c = 8, then 3c=3(8)=243c = 3(8) = 24, not 38.

    (d) If a=43a = \frac{4}{3}, then 4+a=4a4 + a = 4a.
    Answer: False. Substituting a=43a = \frac{4}{3}, we get 4+434×434 + \frac{4}{3} \neq 4 \times \frac{4}{3}.

    (e) x=7x = 7 is the solution of the equation x+2=5x + 2 = 5.
    Answer: False. The solution to x+2=5x + 2 = 5 is x=3x = 3, not x=7x = 7.

    (f) The equations 13d=713 - d = 7 and d2+3=6\frac{d}{2} + 3 = 6 have the same solution.
    Answer: True. Both equations have the solution d=6d = 6.


Part 2: Matching Equations to Solutions

  1. Match the equations on the left with their solutions on the right:

    (a) 9d=29 - d = 2
    To solve:
    d=92=7d = 9 - 2 = 7
    Answer: (iv) 7

    (b) 7x=217x = 21
    To solve:
    x=217=3x = \frac{21}{7} = 3
    Answer: (v) 3

    (c) c3=5c - 3 = 5
    To solve:
    c=5+3=8c = 5 + 3 = 8
    Answer: (i) 8

    (d) x+4=8x + 4 = 8
    To solve:
    x=84=4x = 8 - 4 = 4
    Answer: (vi) 4

    (e) y2=3\frac{y}{2} = 3
    To solve:
    y=3×2=6y = 3 \times 2 = 6
    Answer: (iii) 6

    (f) 12=7a212 = 7a - 2
    To solve:
    7a=12+2=147a = 12 + 2 = 14
    a=147=2a = \frac{14}{7} = 2
    Answer: (ii) 2


Let me know if you'd like more details on any part of this, or if you have questions!

Here are five related questions for practice:

  1. What is the solution to the equation 2x+7=152x + 7 = 15?
  2. How do you solve x4+2=6\frac{x}{4} + 2 = 6?
  3. What are the key differences between an expression and an equation?
  4. Solve for yy in y+5=10y + 5 = 10.
  5. How would you check if two equations have the same solution?

Tip: Always isolate the variable when solving linear equations by performing inverse operations like addition, subtraction, multiplication, or division.

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Algebra

Formulas

Basic linear equation solving
Substitution and isolation of variables

Theorems

Properties of equality
Solution equivalency

Suitable Grade Level

Grades 6-8