Answer:
Step-by-step explanation:
<u>Given system:</u>
<u>Multiply the first equation by 7 and add up the equations:</u>
- -7x + 7y + 7x + 3y = 7*8 - 16
- 10y = 40
- y = 4
<u>Find y:</u>
Answer:
3/5
Step-by-step explanation:
ir would be 6/10 but simplified it would be 3/5
3x+5y=16 is linear equation........
The answer is 6,889. Squared just means the number times itself. In this case, it's 83 x 83. :)
Maria = x
Tom = y
Use substitution
x+y=30
2y=x
2y+y=30
3y=30
y=10
Tom is 10 years old.
x+y=30
x+10=30
x=20
Maria is 20 years old.
