3x+21(x-4)=66

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Solution for 3x+21(x-4)=66 equation:


Simplifying
3x + 21(x + -4) = 66

Reorder the terms:
3x + 21(-4 + x) = 66
3x + (-4 * 21 + x * 21) = 66
3x + (-84 + 21x) = 66

Reorder the terms:
-84 + 3x + 21x = 66

Combine like terms: 3x + 21x = 24x
-84 + 24x = 66

Solving
-84 + 24x = 66

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 + 24x = 66 + 84

Combine like terms: -84 + 84 = 0
0 + 24x = 66 + 84
24x = 66 + 84

Combine like terms: 66 + 84 = 150
24x = 150

Divide each side by '24'.
x = 6.25

Simplifying
x = 6.25

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