Math Problem Statement

Solve the following equations: 1. 19 - (x/2) = 11 - (7/2) 2. 18x - 9 - 10x = 63

Solution

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  1. First problem: 19x2=117219 - \frac{x}{2} = 11 - \frac{7}{2}

  2. Second problem: 18x910x=6318x - 9 - 10x = 63

Problem 1:

19x2=117219 - \frac{x}{2} = 11 - \frac{7}{2}

Step 1: Simplify the constants 19=382,11=22219 = \frac{38}{2}, \quad 11 = \frac{22}{2} 19x2=382x2,1172=22272=15219 - \frac{x}{2} = \frac{38}{2} - \frac{x}{2}, \quad 11 - \frac{7}{2} = \frac{22}{2} - \frac{7}{2} = \frac{15}{2} Thus, the equation becomes: 382x2=152\frac{38}{2} - \frac{x}{2} = \frac{15}{2}

Step 2: Combine like terms 38x2=152\frac{38 - x}{2} = \frac{15}{2}

Step 3: Clear the denominator by multiplying by 2 38x=1538 - x = 15

Step 4: Solve for xx x=3815=23x = 38 - 15 = 23 So, x=23x = 23.

Problem 2:

18x910x=6318x - 9 - 10x = 63

Step 1: Combine like terms (18x10x)9=63    8x9=63(18x - 10x) - 9 = 63 \implies 8x - 9 = 63

Step 2: Solve for xx 8x=63+9    8x=728x = 63 + 9 \implies 8x = 72 x=728=9x = \frac{72}{8} = 9 So, x=9x = 9.


Would you like further details or explanations on any step?

Here are 5 related questions to expand your understanding:

  1. How do you solve linear equations with fractions?
  2. What are the steps to simplify an equation before solving for xx?
  3. How can combining like terms help in solving equations faster?
  4. Why do we multiply both sides of the equation to eliminate fractions?
  5. How do you check if the solution to an equation is correct?

Tip: Always check your solutions by plugging the values of xx back into the original equations.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Combining Like Terms

Formulas

Simplifying linear equations by combining like terms
Isolating the variable in an equation

Theorems

Basic Properties of Equality

Suitable Grade Level

Grades 7-9