3(-28-7x)=42

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Solution for 3(-28-7x)=42 equation: 


Simplifying
3(-28 + -7x) = 42
(-28 * 3 + -7x * 3) = 42
(-84 + -21x) = 42

Solving
-84 + -21x = 42

Solving for variable 'x'.

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

Add '84' to each side of the equation.
-84 + 84 + -21x = 42 + 84

Combine like terms: -84 + 84 = 0
0 + -21x = 42 + 84
-21x = 42 + 84

Combine like terms: 42 + 84 = 126
-21x = 126

Divide each side by '-21'.
x = -6

Simplifying
x = -6

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