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defon
3 years ago
11

Solve 3x+2y=4 4x+3y=7 algebraically

Mathematics
1 answer:
Leona [35]3 years ago
8 0
Step 1. Multiply first equation with -3 and the second one with 2. You'll get:
\left \{ {{-9x-6y=-12} \atop {8x+6y=14}} \right.

Step 2. Add both equations together. You'll get:
-x=2, which gives x = -2

Step 3. Replace x = -2 in the first equation and calculate y.
3(-2)+2y=4\\
y=\frac{4+6}{2}=5

The solution is: x=-2, y=5
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A taxi driver had 27 fares to and from the airport last Monday. The price for a ride to the airport is $14, and the price for a
OLga [1]

Answer:

(15, 12)

Step-by-step explanation:

Let's generate two systems of equations that fit this scenario.

Number of trips to the airport = x

Number of trips from the airport = y

Total number of trips to and from the airport = 27

Thus:

x + y = 27 => equation 1.

Total price for trips to the Airport = 14*x = 14x

Total price of trips from the airport = 7*y = 7y

Total collected for the day = $294

Thus:

14x + 7y = 294 => equation 2.

Multiply equation 1 by 7, and multiply equation 2 by 1 to make both equations equivalent.

7 × x + y = 27

1 × 14x + 7y = 294

Thus:

7x + 7y = 189 => equation 3

14x + 7y = 294 => equation 4

Subtract equation 4 from equation 3

-7x = -105

Divide both sides by -7

x = 15

Substitute x = 15 in equation 1

x + y = 27

15 + y = 27

Subtract both sides by 15

y = 27 - 15

y = 12

The ordered pair would be (15, 12)

7 0
2 years ago
Help please i can’t figure this out
ehidna [41]
To find the y-intercept: replace x with 0
to find the x-intercept: replace y with 0

x-int:
0 = 10x - 32
32 = 10x
x = 3.2
(3.2, 0)
y-int:
y = 10(0) - 32
y = -32
(0, -32)
6 0
3 years ago
2(t+1)=10. <br><br><br><br> need the answer for t I got the rest just can't get t
harkovskaia [24]

Answer: t=4

<u>Simplify both sides of the equation</u>

<u></u>(2)(t)+(2)(1)=10(Distribute)\\2t+2=10<u></u>

<u></u>

<u>Subtract 2 from both sides</u>

<u></u>2t+2-2=10-2\\2t=8<u></u>

<u></u>

<u>Divide both sides by 2</u>

<u></u>\frac{2t}{2} =\frac{8}{2} \\t=4<u></u>

6 0
3 years ago
Read 2 more answers
FGH~CDE, solve for x <br><br> 13<br><br> 11<br><br> 4<br><br> 14
babunello [35]

Answer:

Choice 2) x = 11

Step-by-step explanation:

7/14 = 8/(x + 5)

8(14) = 7(x + 5)

112 = 7x + 35

7x = 77

X = 11

5 0
2 years ago
The time expired on your parking meter and you received a ticket! The citation fee is $10.00 plus an additional $0.50 per minute
Elina [12.6K]
The answer is $25.00
7 0
3 years ago
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