6x+4+2x+1=21

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Solution for 6x+4+2x+1=21 equation:


Simplifying
6x + 4 + 2x + 1 = 21

Reorder the terms:
4 + 1 + 6x + 2x = 21

Combine like terms: 4 + 1 = 5
5 + 6x + 2x = 21

Combine like terms: 6x + 2x = 8x
5 + 8x = 21

Solving
5 + 8x = 21

Solving for variable 'x'.

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

Add '-5' to each side of the equation.
5 + -5 + 8x = 21 + -5

Combine like terms: 5 + -5 = 0
0 + 8x = 21 + -5
8x = 21 + -5

Combine like terms: 21 + -5 = 16
8x = 16

Divide each side by '8'.
x = 2

Simplifying
x = 2

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