this needs a system
140=5x+10y
y= 2x-1
Now subsitute 2x-1 in for y
140=5x +10(2x-1)
140 = 25x -10
bring over the 10
150 = 25x
the divide
x = 6
now substitue x in in 2x-1
2(6) -1 = 11
there you have it, you have 6 five dollar bills and 11 ten dollar bills.
The number of the $10 bill will be 11 and the number of the $5 bill will be 6.
A Linear system is a system in which the degree of the variable in the equation is one. It may contain one, two, or more than two variables.
Paulette has $140 in $5 and $10 bills.
The number of $10 bills is one less than twice the number of $5 bills.
Let the number of the $10 bill be x and the number of the $5 bill be y. Then the equation will be
10x + 5y = 140 ...1
x = 2y - 1 ...2
By solving equations 1 and 2, then we have
x = 11 and y = 6
Thus, the number of the $10 bill will be 11 and the number of the $5 bill will be 6.
More about the linear system link is given below.
https://brainly.com/question/20379472
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