45+-3S+45+-3S+1S+1S=42

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Solution for 45+-3S+45+-3S+1S+1S=42 equation:


Simplifying
45 + -3S + 45 + -3S + 1S + 1S = 42

Reorder the terms:
45 + 45 + -3S + -3S + 1S + 1S = 42

Combine like terms: 45 + 45 = 90
90 + -3S + -3S + 1S + 1S = 42

Combine like terms: -3S + -3S = -6S
90 + -6S + 1S + 1S = 42

Combine like terms: -6S + 1S = -5S
90 + -5S + 1S = 42

Combine like terms: -5S + 1S = -4S
90 + -4S = 42

Solving
90 + -4S = 42

Solving for variable 'S'.

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

Add '-90' to each side of the equation.
90 + -90 + -4S = 42 + -90

Combine like terms: 90 + -90 = 0
0 + -4S = 42 + -90
-4S = 42 + -90

Combine like terms: 42 + -90 = -48
-4S = -48

Divide each side by '-4'.
S = 12

Simplifying
S = 12

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