Answer:
(6, 5 )
Step-by-step explanation:
Given the 2 equations
4x + 8y = 64 → (1)
7x - 2y = 32 → (2)
Multiplying (2) by 4 and adding to (1) will eliminate the y- term
28x - 8y = 128 → (3)
Add (1) and (3) term by term, that is
32x = 192 ( divide both sides by 32 )
x = 6
Substitute x = 6 into either of the 2 equations
Substituting x = 6 into (1)
4(6) + 8y = 64, that is
24 + 8y = 64 ( subtract 24 from both sides )
8y = 40 ( divide both sides by 8 )
y = 5
Solution is (6, 5 )
Answer:
Step-by-step explanation:
edge 2020
If you knew that 8*300=2400
Then you could likely figure that 8*20=160
And then just add the two together to get 2560
Answer: 2592 square inches. To find the area, multiply the length and the width together. When a question says ___ by ___, they are saying ____ units long and ____ units wide. Here, 72 by 36 means 72 inches long and 36 inches wide, so multiply those together to get your area.
Another way to do it is
2x-y=17
x-y=10, x=10+y
substitute x=10+y for x in 2x-y=17 and get
2(10+y)-y=17
20+2y-y=17
20+y=17
subtract 20 from both sides
y=-3
subsitute y=-3 into equation x-y=10
x-(-3)=10
x+3=10
subtract 3 from both sides
x=7
or subsitute into 2x-y=17
2x-(-3)=17
2x+3=17
subtract 3 from both sides
2x=14
divide both sides by two
x=7
