9-7(1+3s)=20

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Solution for 9-7(1+3s)=20 equation:


Simplifying
9 + -7(1 + 3s) = 20
9 + (1 * -7 + 3s * -7) = 20
9 + (-7 + -21s) = 20

Combine like terms: 9 + -7 = 2
2 + -21s = 20

Solving
2 + -21s = 20

Solving for variable 's'.

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

Add '-2' to each side of the equation.
2 + -2 + -21s = 20 + -2

Combine like terms: 2 + -2 = 0
0 + -21s = 20 + -2
-21s = 20 + -2

Combine like terms: 20 + -2 = 18
-21s = 18

Divide each side by '-21'.
s = -0.8571428571

Simplifying
s = -0.8571428571

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