-0.75(8X-3)7X=-0.75

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Solution for -0.75(8X-3)7X=-0.75 equation:


Simplifying
-0.75(8X + -3) * 7X = -0.75

Reorder the terms:
-0.75(-3 + 8X) * 7X = -0.75

Reorder the terms for easier multiplication:
-0.75 * 7X(-3 + 8X) = -0.75

Multiply -0.75 * 7
-5.25X(-3 + 8X) = -0.75
(-3 * -5.25X + 8X * -5.25X) = -0.75
(15.75X + -42X2) = -0.75

Solving
15.75X + -42X2 = -0.75

Solving for variable 'X'.

Reorder the terms:
0.75 + 15.75X + -42X2 = -0.75 + 0.75

Combine like terms: -0.75 + 0.75 = 0.00
0.75 + 15.75X + -42X2 = 0.00

Begin completing the square.  Divide all terms by
-42 the coefficient of the squared term: 

Divide each side by '-42'.
-0.01785714286 + -0.375X + X2 = 0.00

Move the constant term to the right:

Add '0.01785714286' to each side of the equation.
-0.01785714286 + -0.375X + 0.01785714286 + X2 = 0.00 + 0.01785714286

Reorder the terms:
-0.01785714286 + 0.01785714286 + -0.375X + X2 = 0.00 + 0.01785714286

Combine like terms: -0.01785714286 + 0.01785714286 = 0.00000000000
0.00000000000 + -0.375X + X2 = 0.00 + 0.01785714286
-0.375X + X2 = 0.00 + 0.01785714286

Combine like terms: 0.00 + 0.01785714286 = 0.01785714286
-0.375X + X2 = 0.01785714286

The X term is -0.375X.  Take half its coefficient (-0.1875).
Square it (0.03515625) and add it to both sides.

Add '0.03515625' to each side of the equation.
-0.375X + 0.03515625 + X2 = 0.01785714286 + 0.03515625

Reorder the terms:
0.03515625 + -0.375X + X2 = 0.01785714286 + 0.03515625

Combine like terms: 0.01785714286 + 0.03515625 = 0.05301339286
0.03515625 + -0.375X + X2 = 0.05301339286

Factor a perfect square on the left side:
(X + -0.1875)(X + -0.1875) = 0.05301339286

Calculate the square root of the right side: 0.230246374

Break this problem into two subproblems by setting 
(X + -0.1875) equal to 0.230246374 and -0.230246374.

Subproblem 1

X + -0.1875 = 0.230246374 Simplifying X + -0.1875 = 0.230246374 Reorder the terms: -0.1875 + X = 0.230246374 Solving -0.1875 + X = 0.230246374 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '0.1875' to each side of the equation. -0.1875 + 0.1875 + X = 0.230246374 + 0.1875 Combine like terms: -0.1875 + 0.1875 = 0.0000 0.0000 + X = 0.230246374 + 0.1875 X = 0.230246374 + 0.1875 Combine like terms: 0.230246374 + 0.1875 = 0.417746374 X = 0.417746374 Simplifying X = 0.417746374

Subproblem 2

X + -0.1875 = -0.230246374 Simplifying X + -0.1875 = -0.230246374 Reorder the terms: -0.1875 + X = -0.230246374 Solving -0.1875 + X = -0.230246374 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '0.1875' to each side of the equation. -0.1875 + 0.1875 + X = -0.230246374 + 0.1875 Combine like terms: -0.1875 + 0.1875 = 0.0000 0.0000 + X = -0.230246374 + 0.1875 X = -0.230246374 + 0.1875 Combine like terms: -0.230246374 + 0.1875 = -0.042746374 X = -0.042746374 Simplifying X = -0.042746374

Solution

The solution to the problem is based on the solutions from the subproblems. X = {0.417746374, -0.042746374}

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