3x+4+8x-5=21

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Solution for 3x+4+8x-5=21 equation:


Simplifying
3x + 4 + 8x + -5 = 21

Reorder the terms:
4 + -5 + 3x + 8x = 21

Combine like terms: 4 + -5 = -1
-1 + 3x + 8x = 21

Combine like terms: 3x + 8x = 11x
-1 + 11x = 21

Solving
-1 + 11x = 21

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + 11x = 21 + 1

Combine like terms: -1 + 1 = 0
0 + 11x = 21 + 1
11x = 21 + 1

Combine like terms: 21 + 1 = 22
11x = 22

Divide each side by '11'.
x = 2

Simplifying
x = 2

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