1)5 (х+8)-11 2)2 (13+х)-15 3)6 (х+5)-2х

Question

1)5 (х+8)-11 2)2 (13+х)-15 3)6 (х+5)-2х

Answer 1

1)
5(х+8)-11=5х+40-11=5х+29
2)
2(13+х)-15=26+2х-15=2х+11
3)
6(х+5)-2х=6х+30-2х=4х+30