Primeira página
/
Matemática
/
Which of the following equations has no real solutions? A. 3x-3=3x-3 B 3(x+3)=3(x+13) C 3(x-3)=3x-9 D. 3x-3=9x-3

Pergunta

Which of the following equations has no real solutions?
A. 3x-3=3x-3
B
3(x+3)=3(x+13)
C 3(x-3)=3x-9
D. 3x-3=9x-3

Which of the following equations has no real solutions? A. 3x-3=3x-3 B 3(x+3)=3(x+13) C 3(x-3)=3x-9 D. 3x-3=9x-3

Solução

expert verifiedVerification of experts
4.5203 Voting
avatar
GiovaniElite · Tutor por 8 anos

Responder

To determine which equation has no real solutions, we need to analyze each equation and see if it leads to a contradiction.

A. 3x - 3 = 3x - 3

Subtract 3x from both sides:
-3 = -3

This is a true statement and holds for all values of x. Therefore, this equation has infinitely many solutions.

B. 3(x + 3) = 3(x + 13)

Expand both sides:
3x + 9 = 3x + 39

Subtract 3x from both sides:
9 = 39

This is a contradiction, meaning there are no real solutions for this equation.

C. 3(x - 3) = 3x - 9

Expand the left side:
3x - 9 = 3x - 9

Subtract 3x from both sides:
-9 = -9

This is a true statement and holds for all values of x. Therefore, this equation has infinitely many solutions.

D. 3x - 3 = 9x - 3

Subtract 3x from both sides:
-3 = 6x - 3

Add 3 to both sides:
0 = 6x

Divide by 6:
x = 0

This equation has one solution, x = 0.

Therefore, the equation that has no real solutions is:

B. 3(x + 3) = 3(x + 13)
Clique para avaliar: