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3 years ago

Use the linear combination method to solve this system of equations. What is the value of x?

Mathematics

2 answers:

Semmy [17]3 years ago

7 0

X=1 because when u put it in then u will find out.y=-1

zepelin [54]3 years ago

4 0

Answer:

x=1

Step-by-step explanation:

We are going to use the matching method, it consists in clear the same incognits in both equations and macth those results. Steps below:

First equation:

-2.4x-3.6y=1.2

-3.6y=1.2+2.4x

y=(1.2+2.4x)/(-3.6)

Second equation:

2.4x+1.2y=1.2

1.2y=1.2-2.4x

y=(1.2-2.4x)/(1.2)

Now we have to match both equations and clear the incognit x

(1.2+2.4x)/(-3.6) = (1.2-2.4x)/(1.2)

(1.2+2.4x) = (1.2-2.4x) *(-3.6)/(1.2)

1.2+2.4x = (1.2-2.4x) *(-3)

1.2+2.4x = -3.6+7.2x

2.4x-7.2x = -3.6-1.2

-4.8x = -4.8

x = (-4.8)/(-4.8)

x = 1

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Identify the form of each equation. 7x + 5y = 8 is in (select) . y − 5 = 3 (x − 9) is in (select) . y = 7x + 9 is in (select) .

erik [133]

Answer:

Let's define all the possible forms:

slope-intercept: y = a*x + b

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then:

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This is in point slope form.

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This is in slope-intercept form.

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RoseWind [281]

Answer:

Step-by-step explanation:

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