6(x+7)-4(x+6)=21

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Solution for 6(x+7)-4(x+6)=21 equation:


Simplifying
6(x + 7) + -4(x + 6) = 21

Reorder the terms:
6(7 + x) + -4(x + 6) = 21
(7 * 6 + x * 6) + -4(x + 6) = 21
(42 + 6x) + -4(x + 6) = 21

Reorder the terms:
42 + 6x + -4(6 + x) = 21
42 + 6x + (6 * -4 + x * -4) = 21
42 + 6x + (-24 + -4x) = 21

Reorder the terms:
42 + -24 + 6x + -4x = 21

Combine like terms: 42 + -24 = 18
18 + 6x + -4x = 21

Combine like terms: 6x + -4x = 2x
18 + 2x = 21

Solving
18 + 2x = 21

Solving for variable 'x'.

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

Add '-18' to each side of the equation.
18 + -18 + 2x = 21 + -18

Combine like terms: 18 + -18 = 0
0 + 2x = 21 + -18
2x = 21 + -18

Combine like terms: 21 + -18 = 3
2x = 3

Divide each side by '2'.
x = 1.5

Simplifying
x = 1.5

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