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leonid [27]
4 years ago
7

HELP MEEE PLEASE I NEED HELPP EKKK

Mathematics
1 answer:
Butoxors [25]4 years ago
6 0

this is answer for number 4

3.5x + 5.5x + 6 = 51

9x = 51 -6 = 45

x =45/9

x = 5 people

answer for number 5 (i assume x is the number)

5x -18 -4x = -36

x = -36 + 18

x = -18

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Solve the systems of equations using substitution. 2x+3y=-8 ,x=4y+7
Viktor [21]

Answer:

(-1, -2)

Step-by-step explanation:

Since the question requires the use of substitution, that's how I will go about this.

Logically, since we know what x equals, with respect to y, we can plug that into the other equation for x, making our equation only have y, therefore, we can solve for one variable at a time, and then use that y value to solve for x

2x + 3y = -8

In this case we are told that x = 4y + 7, therefore that's what we substitute in.

2(4y + 7) + 3y = -8

8y + 14 + 3y = -8

11y +14 = -8

11y = -22

y = -2

Now, since we know y's exact value, we can use that and solve for x in the other equation.

x = 4(-2) + 7

x = -8 + 7

x = -1

Therefore, your final answer is

(-1, -2)

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