the problem is 0.7x=70 I think the answer is 100 Is this correct?
J janetfizz New member Joined Mar 14, 2006 Messages 2 Mar 14, 2006 #1 the problem is 0.7x=70 I think the answer is 100 Is this correct?
stapel Super Moderator Staff member Joined Feb 4, 2004 Messages 16,583 Mar 14, 2006 #2 janetfizz said: I think the answer is 100 Is this correct? Click to expand... To check the answer to any "solving" exercise, plug it back in to the original question: . . . . .0.7x = 70 . . . . .0.7[100] ?=? 70 . . . . .(7/10)(100/1) ?=? 70 . . . . .(7/1)(10/1) ?=? 70 . . . . .70/1 ?=? 70 . . . . .70 = 70 Since the solution "checks", it is valid. Eliz.
janetfizz said: I think the answer is 100 Is this correct? Click to expand... To check the answer to any "solving" exercise, plug it back in to the original question: . . . . .0.7x = 70 . . . . .0.7[100] ?=? 70 . . . . .(7/10)(100/1) ?=? 70 . . . . .(7/1)(10/1) ?=? 70 . . . . .70/1 ?=? 70 . . . . .70 = 70 Since the solution "checks", it is valid. Eliz.
D Denis Senior Member Joined Feb 17, 2004 Messages 1,707 Mar 14, 2006 #3 janetfizz said: the problem is 0.7x=70 I think the answer is 100 Is this correct? Click to expand... If decimals are confusing you, get rid of them; in this case, multiply by 10: 7x = 700 S'that easier :?:
janetfizz said: the problem is 0.7x=70 I think the answer is 100 Is this correct? Click to expand... If decimals are confusing you, get rid of them; in this case, multiply by 10: 7x = 700 S'that easier :?: