The expression y = 7 + 2x can be substituted into the first equation to find the variable "x"
<h3>System of equation</h3>
System of equation are made of two or more equations with unknowns
Given the system of equation
4x=5-2y
y-2x=7
From equation 2:
y = 7 + 2x
The expression y = 7 + 2x can be substituted into the first equation to find the variable "x"
Learn more on system of equation here: brainly.com/question/14323743
#SPJ1
Answer:
brainliest plss!!
Step-by-step explanation:
jkhujmmmmmjhhhhh
Answer:
- 3 lbs of $6 coffee
- 2 lbs of $4.50 coffee
Step-by-step explanation:
Let x represent the number of pounds of $6 coffee. Then the total cost of the mix is ...
6x + 4.50(5 -x) = 27
1.5x +22.50 = 27.00 . . . . . . simplify
1.5x = 4.50 . . . . . . . . . . . . . . subtract 22.50
x = 3 . . . . . . . . . . . . . . . . . . . .divide by 1.5; pounds of $6 coffee
5 -x = 2 . . . . . . . . . . . . . . . . . pounds of $4.50 coffee
3 pounds of $6 coffee and 2 pounds of $4.50 coffee were used in the mix.