Question

determine a valor do x nas expressões. a) 70=15x-5=. b) 30x=-30+15x​

Answer 1

70 = 15x - 5

70 + 5 = 15x

75 = 15x

x = 75/15

x = 5

30x = -30 + 15x

30x - 15x = -30

15x = -30

x = -30/15

x = -2