7(6-3x-8x)+7(8x+6)=21

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Solution for 7(6-3x-8x)+7(8x+6)=21 equation:


Simplifying
7(6 + -3x + -8x) + 7(8x + 6) = 21

Combine like terms: -3x + -8x = -11x
7(6 + -11x) + 7(8x + 6) = 21
(6 * 7 + -11x * 7) + 7(8x + 6) = 21
(42 + -77x) + 7(8x + 6) = 21

Reorder the terms:
42 + -77x + 7(6 + 8x) = 21
42 + -77x + (6 * 7 + 8x * 7) = 21
42 + -77x + (42 + 56x) = 21

Reorder the terms:
42 + 42 + -77x + 56x = 21

Combine like terms: 42 + 42 = 84
84 + -77x + 56x = 21

Combine like terms: -77x + 56x = -21x
84 + -21x = 21

Solving
84 + -21x = 21

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 = 21 + -84

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

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

Divide each side by '-21'.
x = 3

Simplifying
x = 3

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