SavannahGrace06
Answered

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PLEASE HELP ME, ANSWER ALL THE BLANK SPACES PLEASE..



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PLEASE HELP ME ANSWER ALL THE BLANK SPACES PLEASE Ty class=

Sagot :

felipesierra213

Answer:

B. -12x

Step-by-step explanation:

Here are the steps to why B is correct

Multiply the second equation by -4, then add the equations together.

(−2x + 4y = 15)

−4(3x + y = 2)

Becomes:

−2x + 4y = 15

−12x − 4y = −8

Add these equations to eliminate y:

−14x = 7

Then solve −14x = 7 for x:

−14x = 7

-14x/-14 = 7/-14

x = -1/2

Now that we've found x let's plug it back in to solve for y.

Write down an original equation:

−2x + 4y = 15

Substitute -1/2 for x in −2x + 4y = 15:

-2(-1/2) + 4y = 15

4y + 1 = 15(Simplify both sides of the equation)

4y + 1 − 1 = 15 − 1(Subtract 1 to both sides)

4y = 14

4y/4 = 14/4 (Divide both sides by 4)

y = 7/2

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