Question

tim x

X+5x3=300

Answer 1

X = 300 : 3

X =100 :5

X = 300- 20

X = 280

Answer 2

x+8=300

=> x=300-8=292

Vậy x=292

Answer 3

x+5*3=300

x+15=300

x=300-15

x=285

-k cj

Answer 4

X+15=300

X=300-15

X=285

Answer 5

x+5x3=300

=>x+5=100

=>x=95

Answer 6

X+15=300

X=300-15=285

Answer 7

x + 5x3 = 300

x + 15  = 300

x         = 300 - 15

x         -= 285