4y+12+3y-78=-9

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Solution for 4y+12+3y-78=-9 equation:


Simplifying
4y + 12 + 3y + -78 = -9

Reorder the terms:
12 + -78 + 4y + 3y = -9

Combine like terms: 12 + -78 = -66
-66 + 4y + 3y = -9

Combine like terms: 4y + 3y = 7y
-66 + 7y = -9

Solving
-66 + 7y = -9

Solving for variable 'y'.

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

Add '66' to each side of the equation.
-66 + 66 + 7y = -9 + 66

Combine like terms: -66 + 66 = 0
0 + 7y = -9 + 66
7y = -9 + 66

Combine like terms: -9 + 66 = 57
7y = 57

Divide each side by '7'.
y = 8.142857143

Simplifying
y = 8.142857143

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