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For number 42 what's the equation b.h/2 ? What do we do for x

For number 42 what's the equation b.h/2 ? What do we do for x-example-1
User Ivan Choo
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notice the picture below

thus, we know the total area is 70 square meters
now, if we add those areas, it should give us 70
thus

(5x)+(40)+(5x)=70 solve for "x"

For number 42 what's the equation b.h/2 ? What do we do for x-example-1
User Andreas Krohn
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