<u>Answer</u>:
x = 7, y = 2
<u>Explanation</u>:
equations given:
x + 7y = 21
x + 4y = 15
make "x" the subject:
x + 7y = 21
x = 21 - 7y .........equation 1
x + 4y = 15
x = 15 - 4y .......equation 2
Solving both the equations simultaneously:
15 - 4y = 21 - 7y
-4y + 7y = 21 - 15
3y = 6
y = 6 ÷ 3
y = 2
If y is 2
Then x = 21 -7y;
x = 21 - 7(2)
x = 21 - 14
x = 7
22 would be the answer. You reverse the equation so you multiply 3 and add 7 5x3 = 15 15+7= 22
Answer:
$6.60
Step-by-step explanation:
11 x .40 = 4.4
11 - 4.4 = 6.6
Answer:
Step-by-step explanation:
24 + 4y = 12y
- 4y - 4y
__________
I am joyous to assist you anytime.
Answer:
0.375
Step-by-step explanation:
510 male out of a total of 1360
510/1360 = 0.375
