4(x^2-1)-7y=9

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Solution for 4(x^2-1)-7y=9 equation:


Simplifying
4(x2 + -1) + -7y = 9

Reorder the terms:
4(-1 + x2) + -7y = 9
(-1 * 4 + x2 * 4) + -7y = 9
(-4 + 4x2) + -7y = 9

Solving
-4 + 4x2 + -7y = 9

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '4' to each side of the equation.
-4 + 4x2 + 4 + -7y = 9 + 4

Reorder the terms:
-4 + 4 + 4x2 + -7y = 9 + 4

Combine like terms: -4 + 4 = 0
0 + 4x2 + -7y = 9 + 4
4x2 + -7y = 9 + 4

Combine like terms: 9 + 4 = 13
4x2 + -7y = 13

Add '7y' to each side of the equation.
4x2 + -7y + 7y = 13 + 7y

Combine like terms: -7y + 7y = 0
4x2 + 0 = 13 + 7y
4x2 = 13 + 7y

Divide each side by '4'.
x2 = 3.25 + 1.75y

Simplifying
x2 = 3.25 + 1.75y

Reorder the terms:
-3.25 + x2 + -1.75y = 3.25 + 1.75y + -3.25 + -1.75y

Reorder the terms:
-3.25 + x2 + -1.75y = 3.25 + -3.25 + 1.75y + -1.75y

Combine like terms: 3.25 + -3.25 = 0.00
-3.25 + x2 + -1.75y = 0.00 + 1.75y + -1.75y
-3.25 + x2 + -1.75y = 1.75y + -1.75y

Combine like terms: 1.75y + -1.75y = 0.00
-3.25 + x2 + -1.75y = 0.00

The solution to this equation could not be determined.

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