7x+4=2x+21

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


Simplifying
7x + 4 = 2x + 21

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

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

Solving
4 + 7x = 21 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
4 + 7x + -2x = 21 + 2x + -2x

Combine like terms: 7x + -2x = 5x
4 + 5x = 21 + 2x + -2x

Combine like terms: 2x + -2x = 0
4 + 5x = 21 + 0
4 + 5x = 21

Add '-4' to each side of the equation.
4 + -4 + 5x = 21 + -4

Combine like terms: 4 + -4 = 0
0 + 5x = 21 + -4
5x = 21 + -4

Combine like terms: 21 + -4 = 17
5x = 17

Divide each side by '5'.
x = 3.4

Simplifying
x = 3.4

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