Answer:
dividing is always the last step
Step-by-step explanation:
Please comment if you have any questions... :)
Answer:
Step-by-step explanation:
For mixture problems, it is convenient to define a variable to represent the amount of the greatest contributor. Let x represent the amount of 22% solution in the mix. Then 4.8-x is the amount of 10% solution.
The amount of alcohol in the mix is ...
0.22x +0.10(4.8-x) = 0.12(4.8)
Eliminating parentheses, we have ...
0.22x -0.10x +0.10(4.8) = 0.12(4.8)
Subtracting (0.10)(4.8) and combining x-terms gives ...
0.12x = 0.02(4.8)
x = (0.02/0.12)(4.8) = 0.8 . . . . . divide by the x-coefficient
The scientist needs 0.8 L of 22% solution and 4.0 L of 10% solution.
Answer:
A
B
-
4
x
+
9
B
C
=
5
x
+
2
=
A
=
9
x/
B
+
2/
B
−
9
C
A
C
−
56
=
A
=
9
x
/B
+
2/
B
−
9
C
x=A=9x/B+2x/B-9C
I hope this helps
Of means multiplication
So
And then simplify the numerator ad denominator
=
And simplify the numerator and denominator again
=
And we are finally left with the answer which is
