Question

найдете значение выражения 4x-(x+5)при x=8

Answer 1

4х-(х+5)=4х-х-5
при х=8
4х-х-5=4*8-8-5=32-8-5=19.

Answer 2

$\mathtt{4x-(x+5)}\\\mathtt{=4x-x-5}\\\mathtt{ =3x-5}\\\mathtt{=3*8-5}\\\mathtt{=19}$ ^-^