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Vikki [24]
3 years ago
9

Solve x/2 - 3 = 7 A. 5 B. 10 C. 20 D. 40

Mathematics
2 answers:
12345 [234]3 years ago
4 0

Answer:

The answer is C.

Step-by-step explanation:

Add 3 to both sides and you will get x/2=10. Multiply by the reciprocal on both sides making x=20.

lakkis [162]3 years ago
3 0
The answer is C. Add three to both sides, and you get 10 replacing 7. 10 is now x, and divide
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Solve for m when: 3-2m=-1​
kati45 [8]
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5 0
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3 years ago
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Solve the following system of equations and show all work.<br> y = 2x^2 +9x<br> y = 4x + 25
Genrish500 [490]

Answer:

x = 5/2 thì y = 35 và x = -5 thì y = 5

Step-by-step explanation:

thay y = 4x + 25 vào phương trình y = 2x ^ 2 + 9x ta có:

4x + 25 = 2x ^ 2 + 9x

⇒2x ^ 2 + 5x - 25 = 0

⇒ x = 5/2 và x = -5

thay x = 5/2 vào phương trình y = 4x + 25 ⇒ y = 4*(5/2) + 25 = 35

thay x = -5 vào phương trình y = 4x + 25 ⇒ y = 4*(-5) + 25 = 5

7 0
4 years ago
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