129=.5(35+x)

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Solution for 129=.5(35+x) equation:


Simplifying
129 = 0.5(35 + x)
129 = (35 * 0.5 + x * 0.5)
129 = (17.5 + 0.5x)

Solving
129 = 17.5 + 0.5x

Solving for variable 'x'.

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

Add '-0.5x' to each side of the equation.
129 + -0.5x = 17.5 + 0.5x + -0.5x

Combine like terms: 0.5x + -0.5x = 0.0
129 + -0.5x = 17.5 + 0.0
129 + -0.5x = 17.5

Add '-129' to each side of the equation.
129 + -129 + -0.5x = 17.5 + -129

Combine like terms: 129 + -129 = 0
0 + -0.5x = 17.5 + -129
-0.5x = 17.5 + -129

Combine like terms: 17.5 + -129 = -111.5
-0.5x = -111.5

Divide each side by '-0.5'.
x = 223

Simplifying
x = 223

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