-3x(-5)-7y=21

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Solution for -3x(-5)-7y=21 equation:


Simplifying
-3x(-5) + -7y = 21

Reorder the terms for easier multiplication:
-3 * -5x + -7y = 21

Multiply -3 * -5
15x + -7y = 21

Solving
15x + -7y = 21

Solving for variable 'x'.

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

Add '7y' to each side of the equation.
15x + -7y + 7y = 21 + 7y

Combine like terms: -7y + 7y = 0
15x + 0 = 21 + 7y
15x = 21 + 7y

Divide each side by '15'.
x = 1.4 + 0.4666666667y

Simplifying
x = 1.4 + 0.4666666667y

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