21=6x+7x-5

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Solution for 21=6x+7x-5 equation:


Simplifying
21 = 6x + 7x + -5

Reorder the terms:
21 = -5 + 6x + 7x

Combine like terms: 6x + 7x = 13x
21 = -5 + 13x

Solving
21 = -5 + 13x

Solving for variable 'x'.

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

Add '-13x' to each side of the equation.
21 + -13x = -5 + 13x + -13x

Combine like terms: 13x + -13x = 0
21 + -13x = -5 + 0
21 + -13x = -5

Add '-21' to each side of the equation.
21 + -21 + -13x = -5 + -21

Combine like terms: 21 + -21 = 0
0 + -13x = -5 + -21
-13x = -5 + -21

Combine like terms: -5 + -21 = -26
-13x = -26

Divide each side by '-13'.
x = 2

Simplifying
x = 2

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