7(-9-6x)=21

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Solution for 7(-9-6x)=21 equation: 


Simplifying
7(-9 + -6x) = 21
(-9 * 7 + -6x * 7) = 21
(-63 + -42x) = 21

Solving
-63 + -42x = 21

Solving for variable 'x'.

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

Add '63' to each side of the equation.
-63 + 63 + -42x = 21 + 63

Combine like terms: -63 + 63 = 0
0 + -42x = 21 + 63
-42x = 21 + 63

Combine like terms: 21 + 63 = 84
-42x = 84

Divide each side by '-42'.
x = -2

Simplifying
x = -2

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