178k views
1 vote
What would be equivalent to (-7 x +8x + 19 y) - (6 y + 8 - 20 x - 16 y)

2 Answers

5 votes
29y + 21x - 8
Would be equivalent to your expression
User IceFire
by
7.5k points
4 votes

Answer:

29 y + 21 x - 8

Explanation:

Simplify the following:

-7 x + 8 x + 19 y - (6 y + 8 - 20 x - 16 y)

Grouping like terms, 6 y + 8 - 20 x - 16 y = (6 y - 16 y) - 20 x + 8:

-7 x + 8 x + 19 y - ((6 y - 16 y) - 20 x + 8)

6 y - 16 y = -10 y:

-7 x + 8 x + 19 y - (-10 y - 20 x + 8)

Factor 2 out of -10 y - 20 x + 8:

-7 x + 8 x + 19 y - 2 (-5 y - 10 x + 4)

Grouping like terms, -7 x + 8 x + 19 y - 2 (-5 y - 10 x + 4) = 19 y - 2 (4 - 10 x - 5 y) + (8 x - 7 x):

19 y - 2 (4 - 10 x - 5 y) + (8 x - 7 x)

8 x - 7 x = x:

19 y - 2 (4 - 10 x - 5 y) + x

-2 (4 - 10 x - 5 y) = -8 + 20 x + 10 y:

19 y + -8 + 20 x + 10 y + x

Grouping like terms, 19 y - 8 + 20 x + 10 y + x = (19 y + 10 y) + (20 x + x) - 8:

(19 y + 10 y) + (20 x + x) - 8

19 y + 10 y = 29 y:

29 y + (20 x + x) - 8

20 x + x = 21 x:

Answer: 29 y + 21 x - 8

User AdamVe
by
8.1k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories