51-x=(15-x)(4)

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Solution for 51-x=(15-x)(4) equation:


Simplifying
51 + -1x = (15 + -1x)(4)

Reorder the terms for easier multiplication:
51 + -1x = 4(15 + -1x)
51 + -1x = (15 * 4 + -1x * 4)
51 + -1x = (60 + -4x)

Solving
51 + -1x = 60 + -4x

Solving for variable 'x'.

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

Add '4x' to each side of the equation.
51 + -1x + 4x = 60 + -4x + 4x

Combine like terms: -1x + 4x = 3x
51 + 3x = 60 + -4x + 4x

Combine like terms: -4x + 4x = 0
51 + 3x = 60 + 0
51 + 3x = 60

Add '-51' to each side of the equation.
51 + -51 + 3x = 60 + -51

Combine like terms: 51 + -51 = 0
0 + 3x = 60 + -51
3x = 60 + -51

Combine like terms: 60 + -51 = 9
3x = 9

Divide each side by '3'.
x = 3

Simplifying
x = 3

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