4.2(4.2)+2.5y=-9.1

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Solution for 4.2(4.2)+2.5y=-9.1 equation: 


Simplifying
4.2(4.2) + 2.5y = -9.1

Multiply 4.2 * 4.2
17.64 + 2.5y = -9.1

Solving
17.64 + 2.5y = -9.1

Solving for variable 'y'.

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

Add '-17.64' to each side of the equation.
17.64 + -17.64 + 2.5y = -9.1 + -17.64

Combine like terms: 17.64 + -17.64 = 0.00
0.00 + 2.5y = -9.1 + -17.64
2.5y = -9.1 + -17.64

Combine like terms: -9.1 + -17.64 = -26.74
2.5y = -26.74

Divide each side by '2.5'.
y = -10.696

Simplifying
y = -10.696

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