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sweet-ann [11.9K]
3 years ago
15

If 3x +y=12 find x when y=-15

Mathematics
1 answer:
maw [93]3 years ago
8 0

Answer:

x=9

Step-by-step explanation:

3x+y=12

3x+(-15)=12

3x=27

3/3= 27/3

x=9

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WHAT IS THE ANSWER FOR 12 1/3 + 8 3/4 +17 2/8 +23 2/3=
gulaghasi [49]
12  \dfrac{1}{3}  + 8  \dfrac{3}{4}  +17  \dfrac{2}{8}  +23  \dfrac{2}{3}

Simplify
= 12  \dfrac{1}{3}  + 8  \dfrac{3}{4}  +17  \dfrac{1}{4}  +23  \dfrac{2}{3}

Change the denominators to be the same
= 12  \dfrac{1 \times 4}{3 \times 4}  + 8  \dfrac{3 \times 3}{4 \times 3}  +17  \dfrac{1 \times 3 }{4 \times 3}  +23  \dfrac{2 \times 4}{3 \times 4}

= 12  \dfrac{4}{12}  + 8  \dfrac{9}{12}  +17  \dfrac{3 }{12}  +23  \dfrac{8}{12}

Combine into single fraction
= 60  \dfrac{24}{12}

= 62

6 0
3 years ago
Equivalent to (6 + y) × 5?
Sergeeva-Olga [200]
The answer is:
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6 0
3 years ago
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Sadie measured the floor of her storage unit, which is rectangular. It is 9 meters wide and 10 meters from one corner to the opp
Evgen [1.6K]

Answer:

lack

Step-by-step explanation:

4 0
3 years ago
What would be the answer?
cluponka [151]
When you subtract the length of the base from the length of the side, you get
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5 0
3 years ago
A number added to 5 is the same as twice the number. find the number
victus00 [196]

Answer:

5

Step-by-step explanation:

5 + 5 = 10

5 x 2 = 10

hope this helps

7 0
2 years ago
Read 2 more answers
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