4h + 6 = 22 So 4h = 16 and then h = 4
-98-4h+8k-40+k-9h = (-98-40)+(-4h-9h)+(8k+k) = -138-13h+9k
It is an equation in one variable.
You can chose any letter as your variable. I'll use f. 8+f=24 Subtract 8 from both sides. f=16
8 h 30 min =7h 100 m 7h 100min-4h 55 min=3h 45 min
20 - 4h is an algebraic expression in one variable, h. It cannot be solved since it is not an equation nor an inequality; it cannot be evaluated without any information about h.
-(h - 4)(h + 8)
4h + 6 = 22 So 4h = 16 and then h = 4
7x+8 is not possible. you cannot add a non variable to a variable
-98-4h+8k-40+k-9h = (-98-40)+(-4h-9h)+(8k+k) = -138-13h+9k
If you mean 4h+6 = 30 then h has a value of 6
The variable is x.
In the expression 5 + y + 8, y is a variable. We know how much 5 and 8 are, those are definite quantities. Only y has an unknown, and hence variable value.
2g + 5h
It is: 9h+4(2+h) = 9h+8+4h => 13h+8
H is 30
The variable 'x' would equal (8-y)/2. The variable 'y' would equal 8-2x.