Math Problem Statement

Solve each equation as an algebraic proof: 2y + 4 - 5y = y - 1 and -3(1/2(x - 2)) + 4 = -18

Solution

The image shows a worksheet titled "Algebra Proofs HW Worksheet" with two equations presented for algebraic proof:

  1. 2y+45y=y12y + 4 - 5y = y - 1
  2. 3(12(x2))+4=18-3 \left( \frac{1}{2}(x - 2) \right) + 4 = -18

Let's solve these one by one.

1. 2y+45y=y12y + 4 - 5y = y - 1

Step-by-step solution:

  1. Combine like terms on the left side: 2y5y=3y2y - 5y = -3y. 3y+4=y1-3y + 4 = y - 1
  2. Move all terms involving yy to one side: subtract yy from both sides. 3yy+4=1-3y - y + 4 = -1 4y+4=1-4y + 4 = -1
  3. Move constants to the other side by subtracting 4 from both sides. 4y=5-4y = -5
  4. Solve for yy by dividing both sides by -4. y=54=54y = \frac{-5}{-4} = \frac{5}{4}

So, the solution is y=54y = \frac{5}{4}.


2. 3(12(x2))+4=18-3 \left( \frac{1}{2}(x - 2) \right) + 4 = -18

Step-by-step solution:

  1. Distribute the -3 across the parentheses: 3×12(x2)=32(x2)-3 \times \frac{1}{2}(x - 2) = \frac{-3}{2}(x - 2) This simplifies to: 32x+3=18\frac{-3}{2}x + 3 = -18 Now we have: 32x+3+4=18\frac{-3}{2}x + 3 + 4 = -18
  2. Combine constants on the left-hand side: 32x+7=18\frac{-3}{2}x + 7 = -18
  3. Move the constant to the other side by subtracting 7: 32x=25\frac{-3}{2}x = -25
  4. Solve for xx by multiplying both sides by 23\frac{-2}{3}: x=25×23=503x = -25 \times \frac{-2}{3} = \frac{50}{3}

So, the solution is x=503x = \frac{50}{3}.


Would you like more details or have any questions?

Here are some related questions to explore further:

  1. How can you check if your solution to an equation is correct?
  2. What are like terms, and why is it important to combine them first?
  3. How do you deal with fractional coefficients in algebraic equations?
  4. What is the purpose of algebraic proofs in geometry?
  5. How do you interpret and simplify expressions with nested parentheses?

Tip: Always double-check your work by substituting your solution back into the original equation to verify!

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Math Problem Analysis

Mathematical Concepts

Algebra
Equations
Proofs
Distributive Property
Combining Like Terms

Formulas

Distributive property: a(b + c) = ab + ac
Basic linear equation: ax + b = c

Theorems

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Suitable Grade Level

Grades 8-10