-20y-10-17y=18-7(7y-20)

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Solution for -20y-10-17y=18-7(7y-20) equation:


Simplifying
-20y + -10 + -17y = 18 + -7(7y + -20)

Reorder the terms:
-10 + -20y + -17y = 18 + -7(7y + -20)

Combine like terms: -20y + -17y = -37y
-10 + -37y = 18 + -7(7y + -20)

Reorder the terms:
-10 + -37y = 18 + -7(-20 + 7y)
-10 + -37y = 18 + (-20 * -7 + 7y * -7)
-10 + -37y = 18 + (140 + -49y)

Combine like terms: 18 + 140 = 158
-10 + -37y = 158 + -49y

Solving
-10 + -37y = 158 + -49y

Solving for variable 'y'.

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

Add '49y' to each side of the equation.
-10 + -37y + 49y = 158 + -49y + 49y

Combine like terms: -37y + 49y = 12y
-10 + 12y = 158 + -49y + 49y

Combine like terms: -49y + 49y = 0
-10 + 12y = 158 + 0
-10 + 12y = 158

Add '10' to each side of the equation.
-10 + 10 + 12y = 158 + 10

Combine like terms: -10 + 10 = 0
0 + 12y = 158 + 10
12y = 158 + 10

Combine like terms: 158 + 10 = 168
12y = 168

Divide each side by '12'.
y = 14

Simplifying
y = 14

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