3(5w-3)=21

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Solution for 3(5w-3)=21 equation: 


Simplifying
3(5w + -3) = 21

Reorder the terms:
3(-3 + 5w) = 21
(-3 * 3 + 5w * 3) = 21
(-9 + 15w) = 21

Solving
-9 + 15w = 21

Solving for variable 'w'.

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

Add '9' to each side of the equation.
-9 + 9 + 15w = 21 + 9

Combine like terms: -9 + 9 = 0
0 + 15w = 21 + 9
15w = 21 + 9

Combine like terms: 21 + 9 = 30
15w = 30

Divide each side by '15'.
w = 2

Simplifying
w = 2

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