Answer:
Step-by-step explanation:
z = 3
2y + z = 1
2y + 3 = 1 {substituting z =3}
2y = 1 -3
2y = -2
y = - 2/2
y = -1
2x +3y +2z = 13
2x + 3 * (-1) + 2*3 = 13 { {substituting z =3} and y = -1}
2x -3 + 6 =13
2x + 3 = 13
2x = 13 - 3
2x= 10
x = 10/2
x = 5
On sale, the price of a shirt was $16. Originally, it was $20. Find the percent of decrease.
Equals 20 I think
This in the simplest form will be 2/15. You cannot divide this answer by anything which means it is in its simplest form!
Please give brainliest❤️
You can't prove except if you have another informations<span />