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Popular >

x+3y=15,3x+6y=18

Solution

x + 3 y = 15, 3 x + 6 y = 18

Solution

x = - 12, y = 9

Solution steps

[x + 3 y = 15 3 x + 6 y = 18]

Isolate

x

for

x + 3 y = 15 : x = 15 - 3 y

Substitute

x = 15 - 3 y

[3 (15 - 3 y) + 6 y = 18]

Simplify

[45 - 3 y = 18]

Isolate

y

for

45 - 3 y = 18 : y = 9

For

x = 15 - 3 y

Substitute

y = 9

x = 15 - 3 \cdot 9

Simplify

x = - 12

The solutions to the system of equations are:

x = - 12, y = 9

Popular Examples

a = 3, c = 3

a = 3, c = 4

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

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

2x-y+10=0,x+2y-25=0

2 x - y + 10 = 0, x + 2 y - 25 = 0

7m+10n=77,3m+4n=32

7 m + 10 n = 77, 3 m + 4 n = 32

Frequently Asked Questions (FAQ)

What is x+3y=15,3x+6y=18 ?
The solution to x+3y=15,3x+6y=18 is x=-12,y=9