X=-1 and y=3
To solve this, because y is equal to 2x+5, you can substitute 2x+5 into the bottom equation for y.
You now have 3x - (2x + 5) =-6
This can be solved like a normal equation. Multiply each term in the parenthesis by -1.
3x - 2x - 5 = -6
Subtract 2x from 3x
x - 5 = -6
Add 5 to both sides
x=-1
Now you can solve for y by plugging -1 in for x in either equation. Im going to use the top one.
y= 2(-1)+5
y= -2+5
y=3
You can check your answer by plugging in the values for x and y into both equations and making sure both sides equal each other.
Because Sam is 19, and is 6 years older than Mia 19-6=13 so Mia is 13. Mia is also 3 years younger than Alice so Alice’s age= 13+3=16 so Alice is 16
1 gram = 0.00220462 pound
Convert:
0.00220462 × 800 = 1.7637
800 grams = 1.7637 pounds
