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3 years ago

Solve by substitution. 3x + 5y = 12 x + 4y = 11

Mathematics

2 answers:

Zinaida [17]3 years ago

4 0

Answer:

Yay! System of equations!

Step-by-step explanation:

So, to solve this with substitution!

The best one to start with is the bottom one, x+4y=11

So, we can move 4y to the other side of the equation to get the value for x!

$x=-4y+11$

So, to substitute this, we just input this x-value into the other equation!

$3(-4y+11)+5y=12$

So, we have our equation, so let's solve!

$-12y+33+5y=12\\-7y=-21\\y=3$

So, there is our y-value! Now to input this value into either one of the equations to find the x-value!

$x+4(3)=11\\x=-1$

So, there is our solution!

Hope this helps!

If you need more help, then do some research on the greatest source of information, the internet!

Citrus2011 [14]3 years ago

3 0

Answer:

{x,y} = {-1,3}

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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3 years ago

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Answer:

Step-by-step explanation:

The complete question is

Water flows into a tank according to the rate F(t)= (t+6)/(1+t), and at the same time empties out at the rate E(t)= (ln(t+2))/(t+1), with both F(t) and E(t) measured in gallons per minute. How much water, to the nearest galllon, is in the tank at time t=10 minutes.

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