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zloy xaker [14]
1 year ago
8

Solve for x: 3x+2(x-1)=9x+4

Mathematics
2 answers:
VARVARA [1.3K]1 year ago
8 0

Answer:

x = -3/2

Step-by-step explanation:

1) Expand.

3x+2x-2=9x+4

2) Simplify 3x+2x-2 to 5x-2.

5x-2=9x+4

3) Subtract 5x from both sides.

-2=9x+4-5x

4) Simplify 9x+4-5x to 4x+4.

-2=4x+4

5) Subtract 4 from both sides.

-2-4=4x

6) Simplify - 2 - 4 to -6.

-6=4x

7) Divide both sides by 4.

-6/4 = x

8) Simplify 6/4 to 3/2.

-3/2 = x

9) Switch sides.

x = -3/2

bixtya [17]1 year ago
3 0

Answer:

x = -1.5

Step-by-step explanation:

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The amount in kilograms, a, of a radioactive element that remains after t hours can be modeled by the equation a= 0.65(0.92)to t
elena-14-01-66 [18.8K]

Answer:

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Step-by-step explanation:

we know that

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a=a_0(1-r)^t

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In this problem we have

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so

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