What is the solution to -(2x + 4) + x = 3x − 4x − 4?

Mathematics

2 answers:

KATRIN_1 [288]3 years ago

7 0

Answer:

x=-2

Step-by-step explanation:

topjm [15]3 years ago

6 0

Answer:

all real numbers

Step-by-step explanation:

-(2x + 4) + x = 3x − 4x − 4

Distribute the negative sign on the left side. It is the same as having a -1 to the left of the parentheses.

-1(2x + 4) + x = 3x − 4x − 4

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

Combine like terms on the left side. Combine like terms on the right side.

-x - 4 = -x - 4

Add 4 to both sides.

-x = -x

Add x to both sides.

0 = 0

You end up with a true equation. Therefore, there is an infinite number of solutions. Every real number is a solution.

Answer: all real numbers

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PIT_PIT [208]

Let's plug in (18,10) into each answer choice until we find the one that has it as a solution.

A) 2x - y = 26
2(18) - 10 = 26
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Your answer is A.

I'll just do the rest to show that you the they are incorrect.

B) x + y = 18
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C) 2x - 2y = 36
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D) x - y = -28
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Your answer is A) 2x - y = 26.

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3 years ago

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