3x(5+4)2-42=

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Solution for 3x(5+4)2-42= equation:


Simplifying
3x(5 + 4) * 2 + -42 = 0

Combine like terms: 5 + 4 = 9
3x(9) * 2 + -42 = 0

Reorder the terms for easier multiplication:
3 * 9 * 2x + -42 = 0

Multiply 3 * 9
27 * 2x + -42 = 0

Multiply 27 * 2
54x + -42 = 0

Reorder the terms:
-42 + 54x = 0

Solving
-42 + 54x = 0

Solving for variable 'x'.

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

Add '42' to each side of the equation.
-42 + 42 + 54x = 0 + 42

Combine like terms: -42 + 42 = 0
0 + 54x = 0 + 42
54x = 0 + 42

Combine like terms: 0 + 42 = 42
54x = 42

Divide each side by '54'.
x = 0.7777777778

Simplifying
x = 0.7777777778

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