If you mean 4h+6 = 30 then h has a value of 6
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The factors of (x2 + 11x + 30) are (X + 5) and (x + 6)You want to look for two numbers, when multiplied equal 30, and when added equal 11. Start with factors of 30, and see what they add to: 5+6=11, and 5*6=30.
(x+5)(x+6) equals x^2 +11x+30
How about 30 plus 6 = 36 as one example
1/6 + 7/10 = 5/30 + 21/30 = 26/30 = 13/15