2x+4=21-7x

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Solution for 2x+4=21-7x equation:


Simplifying
2x + 4 = 21 + -7x

Reorder the terms:
4 + 2x = 21 + -7x

Solving
4 + 2x = 21 + -7x

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.
4 + 2x + 7x = 21 + -7x + 7x

Combine like terms: 2x + 7x = 9x
4 + 9x = 21 + -7x + 7x

Combine like terms: -7x + 7x = 0
4 + 9x = 21 + 0
4 + 9x = 21

Add '-4' to each side of the equation.
4 + -4 + 9x = 21 + -4

Combine like terms: 4 + -4 = 0
0 + 9x = 21 + -4
9x = 21 + -4

Combine like terms: 21 + -4 = 17
9x = 17

Divide each side by '9'.
x = 1.888888889

Simplifying
x = 1.888888889

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