15=10+3(x+20)

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Solution for 15=10+3(x+20) equation:


Simplifying
15 = 10 + 3(x + 20)

Reorder the terms:
15 = 10 + 3(20 + x)
15 = 10 + (20 * 3 + x * 3)
15 = 10 + (60 + 3x)

Combine like terms: 10 + 60 = 70
15 = 70 + 3x

Solving
15 = 70 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
15 + -3x = 70 + 3x + -3x

Combine like terms: 3x + -3x = 0
15 + -3x = 70 + 0
15 + -3x = 70

Add '-15' to each side of the equation.
15 + -15 + -3x = 70 + -15

Combine like terms: 15 + -15 = 0
0 + -3x = 70 + -15
-3x = 70 + -15

Combine like terms: 70 + -15 = 55
-3x = 55

Divide each side by '-3'.
x = -18.33333333

Simplifying
x = -18.33333333

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