-7y+4(y+6)=21

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Solution for -7y+4(y+6)=21 equation:


Simplifying
-7y + 4(y + 6) = 21

Reorder the terms:
-7y + 4(6 + y) = 21
-7y + (6 * 4 + y * 4) = 21
-7y + (24 + 4y) = 21

Reorder the terms:
24 + -7y + 4y = 21

Combine like terms: -7y + 4y = -3y
24 + -3y = 21

Solving
24 + -3y = 21

Solving for variable 'y'.

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

Add '-24' to each side of the equation.
24 + -24 + -3y = 21 + -24

Combine like terms: 24 + -24 = 0
0 + -3y = 21 + -24
-3y = 21 + -24

Combine like terms: 21 + -24 = -3
-3y = -3

Divide each side by '-3'.
y = 1

Simplifying
y = 1

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