2х – у = 73х + y = 3

Mathematics

2 answers:

Leokris [45]3 years ago

4 0

Answer:

x = 2

y = -3

Step-by-step explanation:

Solve by substitution:

2x - y = 7

Move the 2x to the other side: -y = 7 - 2x

Divide by -1: y = -7 + 2x

Take the other equation: 3x + y = 3

Substitute y in: 3x + (-7 + 2x) = 3

Take out the parenthesis: 3x - 7 + 2x = 3

Move -7 to the other side: 3x + 2x = 3 + 7

Simplify: 5x = 10

x = 2

Take the first equation: 2x - y = 7

Substitute x back in: 2(2) - y = 7

Simplify: 4 - y = 7

-y = 3

y = -3

mote1985 [20]3 years ago

3 0

Answer:

1. x = 1/2y + 3.5

2. x = 1 - 1/3y

Step-by-step explanation:

1. add y on both sides then divide 2 by both sides. It will equal x = 1/2y + 3.5

2. subtract y from both sides then divide both sides by 3. You will get x = 1 - 1/3y.

You might be interested in

Nerissa paid a total of $8 for 4 packs of pencils she purchased from the convenience store. Let p represent the cost of one pack

BARSIC [14]

Answer: 4*p=8

Step-by-step explanation:

You can use inverse operation to answer this equation.

write out you problem: 4 x p =8
The inverse of multiplication is division
you do 4/4 which gives you one but the 4 will cancel itself out
Do 8/4 which gives you 2
under the equation write p = 2
And be sure to line the p up with the p, the equal sign with the equal sign, and the 2 stays where it is ( which should be already lined up with the 8)

3 0

3 years ago

John wants to buy a new laptop computer the computer store sells laptops for $480 or 9 credit payments of $58 how much interest

Neko [114]

First you would need to find out how many 9 payments of 58$ would be and that is 522. Then you would need to subtract the 522 and the 480 and your answer would be 42$ so the interest would be 42$

5 0

4 years ago

1/6 + 3/8 A. 4/6 B. 4/8 C. 4/14 D. 13/24

Naddika [18.5K]

Here is you're answer:

In order to get you're answer you need to find the common denominator then add.