Question

129-29•(15x-27)=42 с объяснением

Answer 1

129-435х+783=42

435х=42-129-783

435х=-870

х=-870/435=-2

Answer 2

To solve the given equation, let's follow the order of operations (PEMDAS/BODMAS):

1. Parentheses/Brackets
2. Exponents/Orders
3. Multiplication and Division (from left to right)
4. Addition and Subtraction (from left to right)

Given equation: 129 - 29 * (15x - 27) = 42

Step 1: Solve inside the parentheses first 15x - 27

Step 2: Perform multiplication -29 * (15x - 27)

Step 3: Subtract the result from the left side of the equation 129 - (-29 * (15x - 27))

Step 4: Continue solving inside the parentheses 129 - (-29 * (15x) - (-29 * 27))

Step 5: Complete the multiplication 129 - (-435x + 783)

Step 6: Distribute the negative sign to both terms inside the parentheses 129 + 435x - 783

Step 7: Combine like terms 435x - 654

Now the equation becomes: 435x - 654 = 42

Step 8: Isolate x on one side of the equation by moving the constant term to the other side:

Add 654 to both sides: 435x = 42 + 654

Step 9: Simplify the right side: 435x = 696

Step 10: Solve for x by dividing both sides by the coefficient of x (435): x = 696 / 435

Step 11: Simplify the fraction (if possible): x ≈ 1.6023

So, the value of x that satisfies the equation is approximately 1.6023.