Answer:
4
Step-by-step explanation:
-2x- 4 + 5x = 8
Collect like terms
-2x + 5x = 8 +4( when a variable crosses over equality sign it becomes either negative or positive depending on the sign)
3x = 12
Divide via by coefficient of x
X = 12/3
= 4
The simplest form is 1/4 or 0.25
Answer:
22 is 40% of what number?
55
32 is 20% of what number?
160
Step-by-step explanation:
If 22 is 40% of a number you can divide 22 by 40 to find what one % would be.
22/40=.55
To find what the whole number is we can multiply that by 100, since we want 100% of the number we have is only 1%.
.55x100=55
Check:
40% of 55= 55x.4=22
Repeat this for the next problem.
32/20=1.6
1.6x100=160
Check:
160x.2=32
4 1/2 = 9/2
1 5/7 = 12/7
9/2 / 12/7 = 21/8 = 2.625
..................o..................2
