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3 years ago

Y=3x-10 2x-5=y plz help me with this and show the work plz i need it for my test

1 answer:

6 0

Substitution Method:

3x - 10 = 2x - 5

3x = 2x + 5

x = 5

Now solving for y:

y = 3x - 10

y = 3(5) - 10

y = 15 - 10

y = 5

(x, y) = (5, 5)

Check answer:

5 = 3(5) - 10
5 = 15 - 10
5 = 5

5 = 2(5) - 5
5 = 10 - 5
5 = 5

Since all of the equalities are true, (5, 5) is a true solution

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3 years ago

Solve for x.

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x = 6 or x = -10

Step-by-step explanation:

Given:

Solve for x.

1 + |2+x|= 9

O x = 4 or x = -8

O x = 7 or X = -11

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x = 6 or X = -10

Solve:

1 + |2+x|= 9

Subtract 1 from both sides:

1 + |2 +x| -1 = 9-1

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|2 + x | = 8

Applying absolute value rule: If |u| = a, a > 0 then u = a or u = -a

2 + x = -8

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2 + x = -8

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2 + x = 8

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2 years ago

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