(7y-63)-(27y+14)=-9(21)

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Solution for (7y-63)-(27y+14)=-9(21) equation:


Simplifying
(7y + -63) + -1(27y + 14) = -9(21)

Reorder the terms:
(-63 + 7y) + -1(27y + 14) = -9(21)

Remove parenthesis around (-63 + 7y)
-63 + 7y + -1(27y + 14) = -9(21)

Reorder the terms:
-63 + 7y + -1(14 + 27y) = -9(21)
-63 + 7y + (14 * -1 + 27y * -1) = -9(21)
-63 + 7y + (-14 + -27y) = -9(21)

Reorder the terms:
-63 + -14 + 7y + -27y = -9(21)

Combine like terms: -63 + -14 = -77
-77 + 7y + -27y = -9(21)

Combine like terms: 7y + -27y = -20y
-77 + -20y = -9(21)

Multiply -9 * 21
-77 + -20y = -189

Solving
-77 + -20y = -189

Solving for variable 'y'.

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

Add '77' to each side of the equation.
-77 + 77 + -20y = -189 + 77

Combine like terms: -77 + 77 = 0
0 + -20y = -189 + 77
-20y = -189 + 77

Combine like terms: -189 + 77 = -112
-20y = -112

Divide each side by '-20'.
y = 5.6

Simplifying
y = 5.6

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