21x+7=3x+16

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Solution for 21x+7=3x+16 equation:


Simplifying
21x + 7 = 3x + 16

Reorder the terms:
7 + 21x = 3x + 16

Reorder the terms:
7 + 21x = 16 + 3x

Solving
7 + 21x = 16 + 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.
7 + 21x + -3x = 16 + 3x + -3x

Combine like terms: 21x + -3x = 18x
7 + 18x = 16 + 3x + -3x

Combine like terms: 3x + -3x = 0
7 + 18x = 16 + 0
7 + 18x = 16

Add '-7' to each side of the equation.
7 + -7 + 18x = 16 + -7

Combine like terms: 7 + -7 = 0
0 + 18x = 16 + -7
18x = 16 + -7

Combine like terms: 16 + -7 = 9
18x = 9

Divide each side by '18'.
x = 0.5

Simplifying
x = 0.5

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