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3 years ago

Please help it’s due today at 6:10am please help me please please need help please

Mathematics

2 answers:

zepelin [54]3 years ago

8 0

Answer:

Step-by-step explanation:

a. 3-4x=-7-4x

3=-7. no solution

b. 15 - 2x = -7x

15 = -5x

x=-3. one solution

c. 7y-21=6y-21

y=0

1. -3x+4=-3x+7

4=7

2. 10+2x = 5x+2

8=3x

x=3/8

3. x+5=x+5

rosijanka [135]3 years ago

3 0

Answer:

Step-by-step explanation:

a) 3 - 4x = -7 - 4x

- 4x in both terms can be cancelled

3 = -7 ⇒ equation with no solution

b) 15 - 2x = -7x

15 = -5x

-3 = x

x = -3

c) 7 (y - 3) = 6y - 21

7y - 21 = 6y - 21

7y - 6y = -21 + 21

y = 0

1) Equation with no solution:

3x + 5 = 12 + 3x

there is no x that conforms that equation because the result is always 5 = 12, which is inconsistent

2) Equation with one solution

2y -5 = 7 ⇒ y = 12/2 ⇒ y = 6

3) Equation with infinite solutions

x - 10 = x - 3 - 7

Any value of x complies with this equation

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