Упрости выражения. a+2a+3b= 4s+s+3r+s= 3x+2y+x+5y=

Question

Упрости выражения.
a+2a+3b=
4s+s+3r+s=
3x+2y+x+5y=

Answer 1

1)a+2a+3b=3a+3b=3(a+b)
2)4s+s+3r+s=6s+3r=3(2s+r)
3)3x+2y+x+5y= 4x+7y