Question

Select all of the equations equivalent to 6x=42.

A x−7=0
B 4x2=14
C x−1=8
D 6x−1=23

Answer 1

Answer:

x-7=0

Step-by-step explanation:

We have two different methods to solve this question and we will still arrive at the same answer

The first method is

6x=42

Let'sdivide both sides by 6

x=7

Substrate 7 from both sides

x-7=0

The second method is

6x=42

Substrate 42 from both sides

6x-42=0

Factorise

6(x-7)=0

6=0

X-7=0

Therefore the final answer is x-7=0

Answer 2

Answer:

A) $x-7=0$

Step-by-step explanation:

$6x=42$

FIRST ANSWER CHOICE:

$x-7=0$ is equivalent to $6x=42$.

Mutiply both sides by 6:

$6(x-7)=6(0)$

$6x-42=0$

$6x=42$

SECOND ANSWER CHOICE:

The equation $4x2=14$ , there is no symbol to seperate $4x$ and $2$ so I can guess it is mutiplication or $8x=14$ . That is not the answer

THIRD ANSWER CHOICE:

The equation x - 1 = 8 cannot be the answer:

x - 1 = 8

$6(x) - 6(1) = 6(8)$

$6x-6=48$

$6x=54$

FOURTH ANSWER CHOICE:

The equation $6x-1=23$ cannot be the answer:

$6x-1=23$

$6x=24$