6(x-7)+21=3(x-5)

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Solution for 6(x-7)+21=3(x-5) equation:


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

Reorder the terms:
6(-7 + x) + 21 = 3(x + -5)
(-7 * 6 + x * 6) + 21 = 3(x + -5)
(-42 + 6x) + 21 = 3(x + -5)

Reorder the terms:
-42 + 21 + 6x = 3(x + -5)

Combine like terms: -42 + 21 = -21
-21 + 6x = 3(x + -5)

Reorder the terms:
-21 + 6x = 3(-5 + x)
-21 + 6x = (-5 * 3 + x * 3)
-21 + 6x = (-15 + 3x)

Solving
-21 + 6x = -15 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
-21 + 6x + -3x = -15 + 3x + -3x

Combine like terms: 6x + -3x = 3x
-21 + 3x = -15 + 3x + -3x

Combine like terms: 3x + -3x = 0
-21 + 3x = -15 + 0
-21 + 3x = -15

Add '21' to each side of the equation.
-21 + 21 + 3x = -15 + 21

Combine like terms: -21 + 21 = 0
0 + 3x = -15 + 21
3x = -15 + 21

Combine like terms: -15 + 21 = 6
3x = 6

Divide each side by '3'.
x = 2

Simplifying
x = 2

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