Question

gente me ajuda nessas a) 7x+5-x+8=37 b)16+2.(7x+8-9=67 c)12+(3x+6).(-7)-5=70 por favor

Answer 1

a) 7x+5-x+8=37 ==> 6x = 37-13==> 6x=24 ==> x = 4

b)16+2.(7x+8) - 9=67 ==>16+14x+16- 9=67==>14x=67-23==>14x=44==>x = 44/14


c)12+(3x+6).(-7)-5=70==>12-21x-42-5=70==>21x= 12-47-70==> 21x=105==>x = 5