18-0.7(s-15)=0.8(9s-15)

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Solution for 18-0.7(s-15)=0.8(9s-15) equation:


Simplifying
18 + -0.7(s + -15) = 0.8(9s + -15)

Reorder the terms:
18 + -0.7(-15 + s) = 0.8(9s + -15)
18 + (-15 * -0.7 + s * -0.7) = 0.8(9s + -15)
18 + (10.5 + -0.7s) = 0.8(9s + -15)

Combine like terms: 18 + 10.5 = 28.5
28.5 + -0.7s = 0.8(9s + -15)

Reorder the terms:
28.5 + -0.7s = 0.8(-15 + 9s)
28.5 + -0.7s = (-15 * 0.8 + 9s * 0.8)
28.5 + -0.7s = (-12 + 7.2s)

Solving
28.5 + -0.7s = -12 + 7.2s

Solving for variable 's'.

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

Add '-7.2s' to each side of the equation.
28.5 + -0.7s + -7.2s = -12 + 7.2s + -7.2s

Combine like terms: -0.7s + -7.2s = -7.9s
28.5 + -7.9s = -12 + 7.2s + -7.2s

Combine like terms: 7.2s + -7.2s = 0.0
28.5 + -7.9s = -12 + 0.0
28.5 + -7.9s = -12

Add '-28.5' to each side of the equation.
28.5 + -28.5 + -7.9s = -12 + -28.5

Combine like terms: 28.5 + -28.5 = 0.0
0.0 + -7.9s = -12 + -28.5
-7.9s = -12 + -28.5

Combine like terms: -12 + -28.5 = -40.5
-7.9s = -40.5

Divide each side by '-7.9'.
s = 5.126582278

Simplifying
s = 5.126582278

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