Answer:

Step-by-step explanation:
we know that

so
by proportion

Answer:
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If (x, 4) lies on the line 3x+y=10, we can just substitute the values in
x=x and 4=y
3x+4= 10
Subtract 4 from each side
3x= 6
Divide by 3 on each side
x=2
so the x in (x,4) must be 2
Conversion: 5 3/8 = 5 · 8 + 3
8
= 43
8
Conversion: 3 7/8 = 3 · 8 + 7
8
= 31
8
Subtract: 43
8
- 31
8
= 43 - 31
8
= 12
8
= 3
2