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Popular >

-2x-7y=30,7x+4y=18

Solution

- 2 x - 7 y = 30, 7 x + 4 y = 18

Solution

x = 6, y = - 6

Solution steps

[- 2 x - 7 y = 30 7 x + 4 y = 18]

Isolate

x

for

- 2 x - 7 y = 30 : x = - \frac{30 + 7 y}{2}

Substitute

x = - \frac{30 + 7 y}{2}

[7 (- \frac{30 + 7 y}{2}) + 4 y = 18]

Simplify

[\frac{- 210 - 41 y}{2} = 18]

Isolate

y

for

\frac{- 210 - 41 y}{2} = 18 : y = - 6

For

x = - \frac{30 + 7 y}{2}

Substitute

y = - 6

x = - \frac{30 + 7 ( - 6 )}{2}

- \frac{30 + 7 ( - 6 )}{2} = 6

x = 6

The solutions to the system of equations are:

x = 6, y = - 6

Popular Examples

4x+2y=6,3x+2y=-2

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

2x+3y=4,43x-5y=10

2 x + 3 y = 4, 43 x - 5 y = 10

x+2y+1=0,2x-3y-12=0

x + 2 y + 1 = 0, 2 x - 3 y - 12 = 0

x-4y=2,3x-12y=6

x - 4 y = 2, 3 x - 12 y = 6

(2x-3y)/4 =3,5x=2y+7

\frac{2 x - 3 y}{4} = 3, 5 x = 2 y + 7

Frequently Asked Questions (FAQ)

What is -2x-7y=30,7x+4y=18 ?
The solution to -2x-7y=30,7x+4y=18 is x=6,y=-6