4x(8-4)+9=20

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Solution for 4x(8-4)+9=20 equation:


Simplifying
4x(8 + -4) + 9 = 20

Combine like terms: 8 + -4 = 4
4x(4) + 9 = 20

Reorder the terms for easier multiplication:
4 * 4x + 9 = 20

Multiply 4 * 4
16x + 9 = 20

Reorder the terms:
9 + 16x = 20

Solving
9 + 16x = 20

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + 16x = 20 + -9

Combine like terms: 9 + -9 = 0
0 + 16x = 20 + -9
16x = 20 + -9

Combine like terms: 20 + -9 = 11
16x = 11

Divide each side by '16'.
x = 0.6875

Simplifying
x = 0.6875

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