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34kurt
2 years ago
14

Solve the systems of equations by substitution. 2x+y=-2 3x-y=7

Mathematics
1 answer:
lukranit [14]2 years ago
5 0

Answer:

To solve the system of equations by substitution:

<u>2x+y=-2</u>

<u>3x-y=7</u>

first solve for y:

2x+y=-2

y=-2x-2

Then plug ^^ equation for y in the other equation

3x-(-2x-2)=7

5x+2=7

5x=5

x=1

Then solve for y:

2(1)+y=-2

y=-4

Final answer is x = 1 and y = -4

Hope it helps!

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The area of plate which is covered by the napkin is equal to the area of folded napkin.

Before finding the area of folded napkin, we should find the dimension of the napkin.
Find the length of the leg side, the two leg has similar length.
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l + l + 8 = 38
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Each leg is 15 cm long.

Find the area of folded napkin
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area = 1/2 × 15 × 15 × 1/2
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