Question

simplifique as expressões: a) x-5+2x b) 6.(2-d), c) 7c+4-8-3c d) -9y+2.(5y-2) me ajudem preciso para agora

Answer 1

a-
x-5+2x
x-5+2x=0
x-2x=5
x=5

b-
6 (2-d)
6 (2-d)=0
6×2d=0
2d=6
d=6/2
d=3

c-