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3 years ago

Moe is 12 years older than Barney .three years ago ,moe was five times as old as Barney .how old is Barney now

Mathematics

2 answers:

Aneli [31]3 years ago

4 0

The answer is 7 years old.

inessss [21]3 years ago

4 0

M=12+b

m-3=5(b-3)
sub 12+b for m
12+b-3=5(b-3)
expand and combine like terms
b+9=5b-15
minus 4b both sides
9=4b-15
add 15 both sidse
24=4b
divide by 4
6=b

barney is 6
moe is 18
3 years ago, barney is 3 and moe is 15, 3*5=15

barney is 6 now

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irga5000 [103]

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Add all of these values up and set it all equal to $78$ .

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Now, simplify.

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Subtract $6$ on both sides.

$\begin{aligned}4x+6-6&=78-6\\4x&=72\end{aligned}$

Divide both sides by $4$ .

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Since Louise's score is $x$ , the answer is $18$ .

<h3>Double-checking</h3>

To verify our answer, add the point totals $18$ , $19$ , $20$ , and $21$ .

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1 year ago

If value of a+b=7and ab=12then find the value of a and b

LiRa [457]

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LuckyWell [14K]

Hey!

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<span>Multiply the 2nd equation by (-4). This will eliminate the x's when you add the two new equations together.
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