What is 5x+4y=1,2-5x+4y=12 ?

The solution to 5x+4y=1,2-5x+4y=12 is x=-9/10 ,y= 11/8

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5x+4y=1,2-5x+4y=12

5 x + 4 y = 1, 2 - 5 x + 4 y = 12

x = - \frac{9}{10}, y = \frac{11}{8}

Solution steps

[5 x + 4 y = 1 2 - 5 x + 4 y = 12]

Isolate

x

for

5 x + 4 y = 1 : x = \frac{1 - 4 y}{5}

Substitute

x = \frac{1 - 4 y}{5}

[2 - 5 \cdot \frac{1 - 4 y}{5} + 4 y = 12]

Simplify

[8 y + 1 = 12]

Isolate

y

for

8 y + 1 = 12 : y = \frac{11}{8}

For

x = \frac{1 - 4 y}{5}

Substitute

y = \frac{11}{8}

x = \frac{1 - 4 \cdot \frac{11}{8}}{5}

\frac{1 - 4 \cdot \frac{11}{8}}{5} = - \frac{9}{10}

x = - \frac{9}{10}

The solutions to the system of equations are:

x = - \frac{9}{10}, y = \frac{11}{8}

3 x + 2 y = 7, 6 x + 5 y = 21

2 x + 3 y + 2 z = 7, 0.83 x + 2 y = 5, 0.22 y + 3 z = 6.1

2 \cdot 2 x - 3 \cdot 1 + 3 \cdot 2 = 0, 0.4 x + y - 88 = 0

x - 2 y = 17, 7 x - 6 y = 47

2 x + 7 y = 17, 5 x + 3 y = - 1

What is 5x+4y=1,2-5x+4y=12 ?
The solution to 5x+4y=1,2-5x+4y=12 is x=-9/10 ,y= 11/8