Answer:
x=3, y=-1
Step-by-step explanation:
We are already given an equation solved for x, making substitution much easier. We know x=4y+7, meaning we can put 4y+7 whenever we see x in the second equation
2x-6y=12
We substitute 4y+7 in place of x
2(4y+7)-6y=12
Now we only have one variable to work on, distribute the 2
8y+14-6y=12
Combine similar terms, 8y-6y=2y
2y+14=12
Subtract 14 from both sides
2y=-2
y=-1
Now we plug in -1 for y in the first equation to find x
x=4(-1)+7
x=-4+7
x=3
5.6!
Explanation: Siri works wonders lol
This is just showing what I did.
100=1 125=2 150=3 175=4 200=5 225=6 250=7 275=8 300=9 325=10 350=11 375=12 400=13 425=14 450=15 475=16 500=17. So on the son's 17th birthday his mom deposited $500 in her son's saving account. Hope I helped!