Answer:
Step-by-step explanation:
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.
8/45 is the correct answerrrrrr
You multiply 3x - y = 3.
So then it's:
6x - 2y = 3
-2x + 2y =6
which equals 4x = 9
Divide 204 to 10.2 or add and then u can get your final answer, you can also multiple.