340=4s-2(10+s)

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Solution for 340=4s-2(10+s) equation:


Simplifying
340 = 4s + -2(10 + s)
340 = 4s + (10 * -2 + s * -2)
340 = 4s + (-20 + -2s)

Reorder the terms:
340 = -20 + 4s + -2s

Combine like terms: 4s + -2s = 2s
340 = -20 + 2s

Solving
340 = -20 + 2s

Solving for variable 's'.

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

Add '-2s' to each side of the equation.
340 + -2s = -20 + 2s + -2s

Combine like terms: 2s + -2s = 0
340 + -2s = -20 + 0
340 + -2s = -20

Add '-340' to each side of the equation.
340 + -340 + -2s = -20 + -340

Combine like terms: 340 + -340 = 0
0 + -2s = -20 + -340
-2s = -20 + -340

Combine like terms: -20 + -340 = -360
-2s = -360

Divide each side by '-2'.
s = 180

Simplifying
s = 180

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