Question

Упростить выражение 3х+8(2х-7) если х=4.5​

Answer 1

Ответ:

3x+8(2x-7)=19x-56=19*4,5-56=29,5

Answer 2

To simplify the expression, let's substitute x with 4.5 and perform the calculations:

3x + 8(2x - 7)

Replacing x with 4.5:

3(4.5) + 8(2(4.5) - 7)

Simplifying inside the parentheses:

3(4.5) + 8(9 - 7)

Evaluating the values inside the parentheses:

3(4.5) + 8(2)

Performing the multiplications:

13.5 + 16

Adding the two terms:

13.5 + 16 = 29.5

Therefore, when x is 4.5, the simplified expression is 29.5.