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kramer
3 years ago
12

Elvate 5-3(X-1) when X=7

Mathematics
2 answers:
USPshnik [31]3 years ago
6 0

If x = 7 we just substitute all the x's by seven, so our equation stays like this:

5 - 3(7 - 1)


Now we solve it:

5 - 3(7 - 1) =

5 - 3(6) =

5 - 18 =

-13


Hope it helped,


BioTeacher101


klemol [59]3 years ago
6 0

To evaluate the expression 5 - 3(x - 1) when x = 7, we need to substitute the value of x, 7, wherever x is present in the expression. Substituting, our expression becomes:

5 - 3(7 - 1)

We now need to do PEMDAS, meaning that we have to simplify the parenthesis first. Doing this, we get:

5 -3(6)

Now wee have to do multiplication.

5 - 18

Now, the final step is to do subtraction.

-13

That means that when x = 7, this expression has a value of -13.

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