X + y = 5
x = 5 - y
2x - y = 7
2(5-y) - y = 7
10 - 2y - y = 7
10 - 3y = 7
10 - 7 = 3y
3 = 3y
y = 1
x + y = 5
x + 1 = 5
x = 5 - 1
x = 4
Answer:
Explanation: it’s important because it teaches about push an pull and motions, I’m Law 1,2, and 3
Answer:
Explanation:
Atom, smaller than that and you get into subatomic particles which don't really have the properties of elements they make up.