Solve as a proportion:
![\frac{9}{12}= \frac{3}{x}](https://tex.z-dn.net/?f=%20%5Cfrac%7B9%7D%7B12%7D%3D%20%20%5Cfrac%7B3%7D%7Bx%7D%20)
x = ?
Cross multiply:-
3 × 12 = 36
Divide:-
36 ÷ 9 = x
36 ÷ 9 = 4
x = 4
9/12 = 3/4
The unknown denominator is 4. <span />
Answer:
X= 2/5 y=-2
Step-by-step explanation:
5x + 2y = -2
3x - 5y = 11.2
Using the elimination method
Multiply equation 1 by 3
Multiply equation 2 by 5
15x + 6y = -6
15x - 25y = 56
Subtrat 3 from 4
-31y= 62
Divide both sides by -31
y= -2
To arrive at x, substitute y= -2 in equation 1
5x + 2y = -2
5x + 2(-2)= -2
5x -4 = -2
Collect like terms
5x= -2+4
5x= 2
Divide both sides by 5
x= 2/5
it means i only paid for %10 out if the 100%.
so therefore, the original price is;
100/10×80=$800
Answer:
there just in different units
Step-by-step explanation: