0.7-3.4y+2.1y=5.9

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Solution for 0.7-3.4y+2.1y=5.9 equation: 


Simplifying
0.7 + -3.4y + 2.1y = 5.9

Combine like terms: -3.4y + 2.1y = -1.3y
0.7 + -1.3y = 5.9

Solving
0.7 + -1.3y = 5.9

Solving for variable 'y'.

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

Add '-0.7' to each side of the equation.
0.7 + -0.7 + -1.3y = 5.9 + -0.7

Combine like terms: 0.7 + -0.7 = 0.0
0.0 + -1.3y = 5.9 + -0.7
-1.3y = 5.9 + -0.7

Combine like terms: 5.9 + -0.7 = 5.2
-1.3y = 5.2

Divide each side by '-1.3'.
y = -4

Simplifying
y = -4

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