-3(4+h)=21

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Solution for -3(4+h)=21 equation: 


Simplifying
-3(4 + h) = 21
(4 * -3 + h * -3) = 21
(-12 + -3h) = 21

Solving
-12 + -3h = 21

Solving for variable 'h'.

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

Add '12' to each side of the equation.
-12 + 12 + -3h = 21 + 12

Combine like terms: -12 + 12 = 0
0 + -3h = 21 + 12
-3h = 21 + 12

Combine like terms: 21 + 12 = 33
-3h = 33

Divide each side by '-3'.
h = -11

Simplifying
h = -11

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