6x-3(21+5)=57

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Solution for 6x-3(21+5)=57 equation:


Simplifying
6x + -3(21 + 5) = 57

Combine like terms: 21 + 5 = 26
6x + -3(26) = 57

Multiply -3 * 26
6x + -78 = 57

Reorder the terms:
-78 + 6x = 57

Solving
-78 + 6x = 57

Solving for variable 'x'.

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

Add '78' to each side of the equation.
-78 + 78 + 6x = 57 + 78

Combine like terms: -78 + 78 = 0
0 + 6x = 57 + 78
6x = 57 + 78

Combine like terms: 57 + 78 = 135
6x = 135

Divide each side by '6'.
x = 22.5

Simplifying
x = 22.5

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