war86
05.12.2019 •
Mathematics
Xavier and madeline’s age combined is 28. xavier is 4 yrs older than half of madeline’s age. how old will xavier be in 2 yrs?
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Ответ:
14 years old
Step-by-step explanation:
let x= Xavier’s age
let y= Madeline’s age
Use linear function:
x+y=28
x=1/2y + 4
x+y=28
x-1/2y=4
Multiply 2nd equation by 2
x+y=28
2x-y=8
Add
3x=36
x=12
12+2=14
y=16
Ответ:
the answers are A, B, C, and F
Step-by-step explanation:
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