book Maths Puzzle Numerical Ability

please help me with this problem {3a+b+c=7
a+3b-c=13
b=2a-1

Read Solution (Total 0)

book Other Question

writing mathematics

your friend needs help understanding how to find the slope of a parallel to a line that passes through the points (2,3)and (4,5). Write an explanation that w the sum of the digits of a 2 digit number is 9. if the number is doubled than decreased by by 36, the answer is the original number with the digits reversed. Find the number. You m