10(7y-7)+10(9-5y)=

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Solution for 10(7y-7)+10(9-5y)= equation:


Simplifying
10(7y + -7) + 10(9 + -5y) = 0

Reorder the terms:
10(-7 + 7y) + 10(9 + -5y) = 0
(-7 * 10 + 7y * 10) + 10(9 + -5y) = 0
(-70 + 70y) + 10(9 + -5y) = 0
-70 + 70y + (9 * 10 + -5y * 10) = 0
-70 + 70y + (90 + -50y) = 0

Reorder the terms:
-70 + 90 + 70y + -50y = 0

Combine like terms: -70 + 90 = 20
20 + 70y + -50y = 0

Combine like terms: 70y + -50y = 20y
20 + 20y = 0

Solving
20 + 20y = 0

Solving for variable 'y'.

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

Add '-20' to each side of the equation.
20 + -20 + 20y = 0 + -20

Combine like terms: 20 + -20 = 0
0 + 20y = 0 + -20
20y = 0 + -20

Combine like terms: 0 + -20 = -20
20y = -20

Divide each side by '20'.
y = -1

Simplifying
y = -1

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