Упрости выражения a+2a+3b,4s+s+3r+s,3x+2y+x+5y,5q+p+2p+6q,10a+2c+a+3c,2a+5a+4b+2b,7f+g+3g+3f,10p+4q+q+2q,6p+2t+5p+4t.
1) 6а 2)9s 3)4x+7y 4)11q+3p 5)11a+5c 6)7a+6b 7)10f+4g 8)10p+7q 9)11p+6f