en

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

3x-9y=21,3x-3y=15

Solution

3 x - 9 y = 21, 3 x - 3 y = 15

Solution

x = 4, y = - 1

Solution steps

[3 x - 9 y = 21 3 x - 3 y = 15]

Isolate

x

for

3 x - 9 y = 21 : x = 7 + 3 y

Substitute

x = 7 + 3 y

[3 (7 + 3 y) - 3 y = 15]

Simplify

[21 + 6 y = 15]

Isolate

y

for

21 + 6 y = 15 : y = - 1

For

x = 7 + 3 y

Substitute

y = - 1

x = 7 + 3 (- 1)

7 + 3 (- 1) = 4

x = 4

The solutions to the system of equations are:

x = 4, y = - 1

Popular Examples

-2x+y=-6,-3x-y=1

- 2 x + y = - 6, - 3 x - y = 1

4x+3y=37,4x+2y=-2

4 x + 3 y = 37, 4 x + 2 y = - 2

4x+5y=3,7x-2y=16

4 x + 5 y = 3, 7 x - 2 y = 16

x + y = - 3, 3 x - y = 15

f(p)+p=2,3f(p)+11=23

f (p) + p = 2, 3 f (p) + 11 = 23

Frequently Asked Questions (FAQ)

What is 3x-9y=21,3x-3y=15 ?
The solution to 3x-9y=21,3x-3y=15 is x=4,y=-1