18=15+6(4+x)

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Solution for 18=15+6(4+x) equation:


Simplifying
18 = 15 + 6(4 + x)
18 = 15 + (4 * 6 + x * 6)
18 = 15 + (24 + 6x)

Combine like terms: 15 + 24 = 39
18 = 39 + 6x

Solving
18 = 39 + 6x

Solving for variable 'x'.

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

Add '-6x' to each side of the equation.
18 + -6x = 39 + 6x + -6x

Combine like terms: 6x + -6x = 0
18 + -6x = 39 + 0
18 + -6x = 39

Add '-18' to each side of the equation.
18 + -18 + -6x = 39 + -18

Combine like terms: 18 + -18 = 0
0 + -6x = 39 + -18
-6x = 39 + -18

Combine like terms: 39 + -18 = 21
-6x = 21

Divide each side by '-6'.
x = -3.5

Simplifying
x = -3.5

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