-3(4.2)-y=-5

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Solution for -3(4.2)-y=-5 equation: 


Simplifying
-3(4.2) + -1y = -5

Multiply -3 * 4.2
-12.6 + -1y = -5

Solving
-12.6 + -1y = -5

Solving for variable 'y'.

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

Add '12.6' to each side of the equation.
-12.6 + 12.6 + -1y = -5 + 12.6

Combine like terms: -12.6 + 12.6 = 0.0
0.0 + -1y = -5 + 12.6
-1y = -5 + 12.6

Combine like terms: -5 + 12.6 = 7.6
-1y = 7.6

Divide each side by '-1'.
y = -7.6

Simplifying
y = -7.6

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