You have it write because bart works 0.3 hours more than charles
Well all I can say is that the answer is 623
Answer: (6,-3)
Explanation:
(1) 2
x-3y=21
(2) y
=
3
−
x
Substituting eq 2 in eq 1
2
x
−
3
(
3-x)=21
2
x-9+3x=21
5
x
−
9
=
21
5
x
=
30
x
=
6
Put x=
6 in eq 2 we get,
y
=3
−
6
y
=
−
3
Solution : (
6
,
−
3
)
By this information, we know: (just so you know, when I will write the equation, the multiplication sign will be ^)
25%+0%=10%
32g xg (32+x)g
Now, we create an equation:
(0.25^32)+(0^x)=0.1^(32+x)
8+0=3.2+0.1x
8=3.2+0.1x
4.8=0.1x
48=x
Answer: 48 gram.