7(2x+x)=21

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Solution for 7(2x+x)=21 equation: 


Simplifying
7(2x + x) = 21

Combine like terms: 2x + x = 3x
7(3x) = 21

Remove parenthesis around (3x)
7 * 3x = 21

Multiply 7 * 3
21x = 21

Solving
21x = 21

Solving for variable 'x'.

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

Divide each side by '21'.
x = 1

Simplifying
x = 1

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