h(-1)=2(-1)-4

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Solution for h(-1)=2(-1)-4 equation: 



h(-1)=2(-1)-4

We move all terms to the left:

h(-1)-(2(-1)-4)=0

We add all the numbers together, and all the variables

h(-1)+6=0

We multiply parentheses

-1h+6=0

We move all terms containing h to the left, all other terms to the right

-h=-6

h=-6/-1

h=+6

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