21=1.5(x+5)

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Solution for 21=1.5(x+5) equation:


Simplifying
21 = 1.5(x + 5)

Reorder the terms:
21 = 1.5(5 + x)
21 = (5 * 1.5 + x * 1.5)
21 = (7.5 + 1.5x)

Solving
21 = 7.5 + 1.5x

Solving for variable 'x'.

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

Add '-1.5x' to each side of the equation.
21 + -1.5x = 7.5 + 1.5x + -1.5x

Combine like terms: 1.5x + -1.5x = 0.0
21 + -1.5x = 7.5 + 0.0
21 + -1.5x = 7.5

Add '-21' to each side of the equation.
21 + -21 + -1.5x = 7.5 + -21

Combine like terms: 21 + -21 = 0
0 + -1.5x = 7.5 + -21
-1.5x = 7.5 + -21

Combine like terms: 7.5 + -21 = -13.5
-1.5x = -13.5

Divide each side by '-1.5'.
x = 9

Simplifying
x = 9

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