280+3h=140+7h

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Solution for 280+3h=140+7h equation: 



280+3h=140+7h

We move all terms to the left:

280+3h-(140+7h)=0

We add all the numbers together, and all the variables

3h-(7h+140)+280=0

We get rid of parentheses

3h-7h-140+280=0

We add all the numbers together, and all the variables

-4h+140=0

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

-4h=-140

h=-140/-4

h=+35

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