Questions on Word Problems: Linear Equations And Systems Word Problems answered by real tutors!

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Question 149182This question is from textbook
: Hi i need exactly step by step solution in this word problem,and check it.thanks
The sum of the digits of the two-digits number is 3.The tens digits is one more than the unit digit.Find the numbers.
This question is from textbook
: Hi i need exactly step by step solution in this word problem,and check it.thanks
The sum of the digits of the two-digits number is 3.The tens digits is one more than the unit digit.Find the numbers.

Answer by edjones(2401) About Me  (Show Source):
You can put this solution on YOUR website!
Let the units digit=u and the tens digit=t.
t+u=3
t-u=1
-----add
2t=4
.
t=2
u=1
.
21 is the number.
.
Ed
Question 149182This question is from textbook
: Hi i need exactly step by step solution in this word problem,and check it.thanks
The sum of the digits of the two-digits number is 3.The tens digits is one more than the unit digit.Find the numbers.
This question is from textbook
: Hi i need exactly step by step solution in this word problem,and check it.thanks
The sum of the digits of the two-digits number is 3.The tens digits is one more than the unit digit.Find the numbers.

Answer by josmiceli(2035) About Me  (Show Source):
You can put this solution on YOUR website!
Let t = the tens digit
Let u = the units digit
(1)t + u = 3
(2)t = u + 1
substitute the expression for t in (2) for t in (1)
u + 1 + u = 3
2u = 2
u = 1
and since
t + u = 3
t + 1 = 3
t = 2
The number is 21
This checks with (1) and (2)