All categories

3 years ago

Solve the equation for 3x-y = -3

Mathematics

1 answer:

S_A_V [24]3 years ago

8 0

Answer:

sln

3x-y=-3

3x-y=-3(make subject x)

3x=-3+y(divided by 3 both sides)

x=(-3+y) /3,x=-1+y /3

find y

3x-y=-3

-y=-3-3x(put the value of x)

-y=-3-3(-1+y/3)

-y=-6(-1+y/3)

-y=6+y/3

-y-y/3 =-3

-4y/3=-3(X by 3 both sides)

--4y=-6(divided by - 4 both sides)

y=1.5

find x

3x-y= -3 (put the value of y)

3x-1.5= -3

3x=-3+1.5

3x=-1.5(divided by 3 both sides)

x=-0. 5

You might be interested in

Please help if you can

dolphi86 [110]

Answer:

x=4 or x=-5/7

Step-by-step explanation:

4 0

3 years ago

A glass top of an office table is in the form of rectangle. The diagonal of the table have length 5x-11 and 2x+25

3241004551 [841]

Answer:

1) The value of $x$ is 12.

2) The length of the diagonal is 49.

Step-by-step explanation:

1) If the glass is a rectangle, then both diagonal must have the same length, that is, the following equation must be solved:

$5\cdot x - 11 = 2\cdot x + 25$ (1)

We need some algebraic handling to determine the value of $x$ :

$5\cdot x - 11 = 2\cdot x + 25$

$5\cdot x - 2\cdot x = 25 +11$

$[5+(-2)] \cdot x = 36$

$3\cdot x = 36$

$x = 12$

The value of $x$ is 12.

2) If we know that $x = 12$ , then the length of the diagonal ( $d$ ) is:

$d = 2\cdot x + 25$

$d = 49$

The length of the diagonal is 49.

4 0

3 years ago

Please help me solve

ruslelena [56]

Answer:

Step-by-step explanation:

So for this we have to find the percentage by using 'percentage of error'

If at first it was 15 then it went up to 19 we have to subtract 15 - 19= -4

Ignore the negative. Now divide= 4/19= 0.21

The size went up by 21%

6 0

3 years ago

Read 2 more answers

True False or Rewrite.

Alex

Answer:

The answer is true.

7 0

3 years ago

If you help I will give you as brainliest

givi [52]

Answer:Option (B)

Step-by-step explanation:

7 0

3 years ago