-0.8=-2(h-7.8)

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Solution for -0.8=-2(h-7.8) equation:


Simplifying
-0.8 = -2(h + -7.8)

Reorder the terms:
-0.8 = -2(-7.8 + h)
-0.8 = (-7.8 * -2 + h * -2)
-0.8 = (15.6 + -2h)

Solving
-0.8 = 15.6 + -2h

Solving for variable 'h'.

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

Add '2h' to each side of the equation.
-0.8 + 2h = 15.6 + -2h + 2h

Combine like terms: -2h + 2h = 0
-0.8 + 2h = 15.6 + 0
-0.8 + 2h = 15.6

Add '0.8' to each side of the equation.
-0.8 + 0.8 + 2h = 15.6 + 0.8

Combine like terms: -0.8 + 0.8 = 0.0
0.0 + 2h = 15.6 + 0.8
2h = 15.6 + 0.8

Combine like terms: 15.6 + 0.8 = 16.4
2h = 16.4

Divide each side by '2'.
h = 8.2

Simplifying
h = 8.2

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