Question

The value of x for which the expressions 3x – 4 and 2x + 1 become

equal is
-3
0
5
1

Answer 1

5

Explanation:

1) make them equal to each other

2) put all the constants on one side and all the ones with x on the other

3) solve

Answer 2

`x=5`

Explanation:

To determine for which value of x a pair of expressions will be equal, we will need to set them equal to each other and then solve for x.

`3x-4=2x+1`

First, we can add 4 to each side

`3x=2x+5`

Now we can subtract 2x from each side

`x=5`

Now, just to check our answer, we can plug in our answer back into the original equation to see whether we get the same result for each side

`3(5)-4=2(5)+1\\\\15-4=10+1\\\\11=11`