3(5+x)=21x

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Solution for 3(5+x)=21x equation:


Simplifying
3(5 + x) = 21x
(5 * 3 + x * 3) = 21x
(15 + 3x) = 21x

Solving
15 + 3x = 21x

Solving for variable 'x'.

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

Add '-21x' to each side of the equation.
15 + 3x + -21x = 21x + -21x

Combine like terms: 3x + -21x = -18x
15 + -18x = 21x + -21x

Combine like terms: 21x + -21x = 0
15 + -18x = 0

Add '-15' to each side of the equation.
15 + -15 + -18x = 0 + -15

Combine like terms: 15 + -15 = 0
0 + -18x = 0 + -15
-18x = 0 + -15

Combine like terms: 0 + -15 = -15
-18x = -15

Divide each side by '-18'.
x = 0.8333333333

Simplifying
x = 0.8333333333

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