-x - 7y = 18
4x + 7y = -30
The -7y and 7y cancel by addition.
Thus, 3x = -12
Divide both sides by 3
x = -4
Plug in -4 for x
Thus, -(-4) - 7y = 18
4 - 7y = 18
Subtract 4 to both sides; 4 - 4 - 7y = 18 - 4
Simplify, -7y = 14
Divide both sides by -7; -7y/-7 = 14 / -7
y = -2
The rule is that you add 1/16 each time. You can see this if you find the common denominator (16):
1/16, 2/16, 3/16, 4/16, 5/16, 6/16
Answer: 38.2
Step-by-step explanation:
Answer:
x=1, y=4. (1, 4).
Step-by-step explanation:
y=4x
x+y=5
----------
x+4x=5
5x=5
x=5/5
x=1
y=4(1)=4
