Answer:
hi how are you are you good just asking do not hace the answer
Here are the steps to solve this equation:
221/x = 17
221 = 17x
17x = 221
17x ÷ 17 = 221 ÷ 17
x = 13
I think its he didnt eliminate the same variables
Answer:
Make sure you subtract any rests or stops you made from the total trip duration. If the total distance travelled was 500 miles and the time it took you was 5 hours, then your average speed was 500 / 5 = 100 miles per hour (mph).
Step-by-step explanation:
<span>x − y + 2z = 1
3x + y + 5z = 19
2x − y − 2z = −17
-3x+3y-6z=-3
</span>3x + y + 5z = 19
4y-z=16 (1)
-2x+2y-4z=-2
<span>2x − y − 2z = −17
y-6z=-19 (2)
</span>4y-z=16 (1)
y-6z=-19 (2)
4y-z=16
-4y+24z=76
23z=92
z=4
y-6z=-19
y-6×4=-19
y-24=-19
y=24-19
y=5
<span>x − y + 2z = 1
</span>x-5+2×4=1
x-5+8=1
x+3=1
x=-2
(x,y,z)=(-2,5,4)
