-21=7x-3y*-8

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Solution for -21=7x-3y*-8 equation:


Simplifying
-21 = 7x + -3y * -8

Reorder the terms for easier multiplication:
-21 = 7x + -3 * -8y

Multiply -3 * -8
-21 = 7x + 24y

Solving
-21 = 7x + 24y

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
-21 + -7x = 7x + -7x + 24y

Combine like terms: 7x + -7x = 0
-21 + -7x = 0 + 24y
-21 + -7x = 24y

Add '21' to each side of the equation.
-21 + 21 + -7x = 21 + 24y

Combine like terms: -21 + 21 = 0
0 + -7x = 21 + 24y
-7x = 21 + 24y

Divide each side by '-7'.
x = -3 + -3.428571429y

Simplifying
x = -3 + -3.428571429y

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