18=3s-4(20-s)

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Solution for 18=3s-4(20-s) equation:


Simplifying
18 = 3s + -4(20 + -1s)
18 = 3s + (20 * -4 + -1s * -4)
18 = 3s + (-80 + 4s)

Reorder the terms:
18 = -80 + 3s + 4s

Combine like terms: 3s + 4s = 7s
18 = -80 + 7s

Solving
18 = -80 + 7s

Solving for variable 's'.

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

Add '-7s' to each side of the equation.
18 + -7s = -80 + 7s + -7s

Combine like terms: 7s + -7s = 0
18 + -7s = -80 + 0
18 + -7s = -80

Add '-18' to each side of the equation.
18 + -18 + -7s = -80 + -18

Combine like terms: 18 + -18 = 0
0 + -7s = -80 + -18
-7s = -80 + -18

Combine like terms: -80 + -18 = -98
-7s = -98

Divide each side by '-7'.
s = 14

Simplifying
s = 14

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