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alina1380 [7]
3 years ago
9

-21+2(3-15)-(-3)(+7)+(-3)(-8)​

Mathematics
2 answers:
Pani-rosa [81]3 years ago
6 0
Simplify the expression

Answer - Zero


Hope this helps

Have a great day!
xxTIMURxx [149]3 years ago
4 0
The answer is 0 I think its been a while since I’ve done math
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Step-by-step explanation:

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6 0
3 years ago
Read 2 more answers
IF l || m , find the values of x and y
egoroff_w [7]

Answer:

x = 8

y = 21

Step-by-step explanation:

(7x + 12)° and (12x - 28)° are alternate interior angles. Alternate interior angles are congruent. Therefore:

(7x + 12)° = (12x - 28)°

Solve for x

7x + 12 = 12x - 28

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Add 9 to both sides

-9 + 9y + 9 = 180 + 9

9y = 189

Divide both sides by 9

9y/9 = 189/9

y = 21

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3 years ago
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