15=5x(-3)

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Solution for 15=5x(-3) equation:


Simplifying
15 = 5x(-3)

Reorder the terms for easier multiplication:
15 = 5 * -3x

Multiply 5 * -3
15 = -15x

Solving
15 = -15x

Solving for variable 'x'.

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

Add '15x' to each side of the equation.
15 + 15x = -15x + 15x

Combine like terms: -15x + 15x = 0
15 + 15x = 0

Add '-15' to each side of the equation.
15 + -15 + 15x = 0 + -15

Combine like terms: 15 + -15 = 0
0 + 15x = 0 + -15
15x = 0 + -15

Combine like terms: 0 + -15 = -15
15x = -15

Divide each side by '15'.
x = -1

Simplifying
x = -1

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