it's middle skool stuff so prolly everyone gets them cuz... ppl here are SMARTTTTTTTTTTTTTTTT someone plz help :( i also need step by step explanation!! thanksss
+37159 Let the number be xy this is the same as 10x + y you are given x+ y = 15 from this you can see that y = 15-x
You are also given yx = 30 + 6x or 10y + x = 30 + 6x sub in the red definition of y into this equation to get:
10(15-x) + x = 30 + 6x
150 - 10x + x = 30 + 6x
120 = 15x
x = 8 since x+y = 15 then y = 7
Original number is then xy 87
reversed number is 78 which is equal to 30 + 6(8)
