For Shading your drawing
simplify both sides of the equation: 1/3h+(-4)(2/3h)+(-4)(-3)=2/3h+-6 ~ distribute that 1/3h+-8/3h+12=2/3h+-6 (1/3h+-8/3h)+(12)=2/3h-6 ~ combine like terms for this -7/3h+12=2/3h-6 -7/3h+12=2/3h-6 subtract 2/3h from both sides: -7/3h+12-_2/3h=_2/3h-6-2/3h -3h+12=6 subtract 12 from both sides: -3h+12-12=-6-12 -3h=-18 divide both sides by -3 -3h/-3=-18/-3 h=6
If you are referring to the phrase "To serve a purpose" then it would mean to give a use for. For example, A pencil holder cup serves a purpose to a pencil... the pencil give the holder purpose and that purpose is to hold the pencil. Basically it means, that something has a use... there is a reason/intended use for this thing.
The purpose of the pencil invention is to write down letters to form words.
to write with.
3h+13 = 7 3h = 7-13 3h = -6 h = -2
Pencils are graded H (Hard) or B (Black). Hard pencils are best for fine lines (such as a draughtman might use), Black pencils are better for most types of drawing (and for shading in). An all purpose pencil is HB (just in the middle), but you can usually find H, 2H, 3H, 4H, B, 2B, 3B, 4B - and sometimes even higher numbers.
To hold pencils
2k - 3(h - 5k) = 2k - 3h + 15k = 17k - 3h
h = -5 8h - 10h = 3h + 25 -2h = 3h + 25 -2h - 3h = 3h - 3h + 25 -5h = 25 h = -5 CHECK: 8(-5) - 10(-5) = 3(-5) + 25 -40 - -50 = -15 + 25 -40 + 50 = 10 10 = 10 CORRECT
I did, I used the pencil sharpener and made the pencil sharper.
8h - 10h = 3h + 25-2h = 3h + 25-5h = 25-h = 5h = -5
The order of hardness goes:9H 8H 7H 6H 5H 4H 3H 2H H F HB B 2B 3B 4B 5B 6B 7B 8B 9B hard medium soft