3 years ago

Solve the system of equations using elimination/ combinations. -2x - y= -4 x+ 2y = 5

Mathematics

1 answer:

dusya [7]3 years ago

7 0

If $-2x-y=-4$ and $x+2y=5$ , notice that

$(-2x-y)+2(x+2y)=-4+2\cdot5\implies3y=6\implies y=2$

Then

$x+2\cdot2=5\implies x=1$

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ace car rental rents cars for x dollars per day plus y dollars for each mile driven carlos renteda car for a 4 days drove 100 mi

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4 0

3 years ago

R/5 - 6 = -1<br> r=1<br> r=5<br> r=10<br> r=25

posledela

R = 30 because r = 1,5,10,25
30/5+1=7
6+1=7

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3 years ago