.80y-1=.40y+7

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Solution for .80y-1=.40y+7 equation:


Simplifying
0.80y + -1 = 0.40y + 7

Reorder the terms:
-1 + 0.80y = 0.40y + 7

Reorder the terms:
-1 + 0.80y = 7 + 0.40y

Solving
-1 + 0.80y = 7 + 0.40y

Solving for variable 'y'.

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

Add '-0.40y' to each side of the equation.
-1 + 0.80y + -0.40y = 7 + 0.40y + -0.40y

Combine like terms: 0.80y + -0.40y = 0.4y
-1 + 0.4y = 7 + 0.40y + -0.40y

Combine like terms: 0.40y + -0.40y = 0.00
-1 + 0.4y = 7 + 0.00
-1 + 0.4y = 7

Add '1' to each side of the equation.
-1 + 1 + 0.4y = 7 + 1

Combine like terms: -1 + 1 = 0
0 + 0.4y = 7 + 1
0.4y = 7 + 1

Combine like terms: 7 + 1 = 8
0.4y = 8

Divide each side by '0.4'.
y = 20

Simplifying
y = 20

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