(8x^2+7x-4)-(8x^2+3)=49

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Solution for (8x^2+7x-4)-(8x^2+3)=49 equation:


Simplifying
(8x2 + 7x + -4) + -1(8x2 + 3) = 49

Reorder the terms:
(-4 + 7x + 8x2) + -1(8x2 + 3) = 49

Remove parenthesis around (-4 + 7x + 8x2)
-4 + 7x + 8x2 + -1(8x2 + 3) = 49

Reorder the terms:
-4 + 7x + 8x2 + -1(3 + 8x2) = 49
-4 + 7x + 8x2 + (3 * -1 + 8x2 * -1) = 49
-4 + 7x + 8x2 + (-3 + -8x2) = 49

Reorder the terms:
-4 + -3 + 7x + 8x2 + -8x2 = 49

Combine like terms: -4 + -3 = -7
-7 + 7x + 8x2 + -8x2 = 49

Combine like terms: 8x2 + -8x2 = 0
-7 + 7x + 0 = 49
-7 + 7x = 49

Solving
-7 + 7x = 49

Solving for variable 'x'.

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

Add '7' to each side of the equation.
-7 + 7 + 7x = 49 + 7

Combine like terms: -7 + 7 = 0
0 + 7x = 49 + 7
7x = 49 + 7

Combine like terms: 49 + 7 = 56
7x = 56

Divide each side by '7'.
x = 8

Simplifying
x = 8

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