Question

Can someone show me step by step to solve this word problem please!!!!!! The sum of a two-digit number and its units digit is 20, and the sum of the number and its tens digit is 16. find the number.

Answer 1

we suppose that number is x and its units digit is b and its tens digit is a
we have
x+b=20 or 10a+b+b=20 or 10a+2b=20
x+a=16 or 10a+b+a=16 or 11a+b=16

solving the system of equations above tells a=1 and b=5
so the number is 15

Answer 2

oh ok i see what you did

Answer 3

thanks!

Answer 4

your welcome