Question

1) 7a-4b+5c;-7a +4b-6c

2) 9x-y+5;x-y+4;-5x+4y-9

3) p+q+r;-2p-6q+3r;p+5q-8r

Answer 1

1) 7a -7a , -4b + 4b, +5c - 6c = -1c

2)9x - 5x +1x, -1y -1y + 4y, 5+4 -9 = 5x; +2y   

3) 1p -2p +1p, 1q - 6q +5q, 1r + 3r -8r = -4r

Suerte con tu tarea ;)