What is x-3/5*y= 66/5 , 1/10*x+3/4*y=-87/20 ?

The solution to x-3/5*y= 66/5 , 1/10*x+3/4*y=-87/20 is x=9,y=-7

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x-3/5y= 66/5 , 1/10x+3/4*y=-87/20

x - \frac{3}{5} \cdot y = \frac{66}{5}, \frac{1}{10} \cdot x + \frac{3}{4} \cdot y = - \frac{87}{20}

x = 9, y = - 7

Solution steps

[x - \frac{3}{5} y = \frac{66}{5} \frac{1}{10} x + \frac{3}{4} y = - \frac{87}{20}]

Isolate

x

for

x - \frac{3}{5} \cdot y = \frac{66}{5} : x = \frac{66}{5} + \frac{3}{5} y

Substitute

x = \frac{66}{5} + \frac{3}{5} y

[\frac{1}{10} (\frac{66}{5} + \frac{3}{5} y) + \frac{3}{4} y = - \frac{87}{20}]

Simplify

[\frac{132 + 81 y}{100} = - \frac{87}{20}]

Isolate

y

for

\frac{132 + 81 y}{100} = - \frac{87}{20} : y = - 7

For

x = \frac{66}{5} + \frac{3}{5} y

Substitute

y = - 7

x = \frac{66}{5} + \frac{3}{5} (- 7)

\frac{66}{5} + \frac{3}{5} (- 7) = 9

x = 9

The solutions to the system of equations are:

x = 9, y = - 7

6 x - 8 y = 15, 3 x + 4 y = 5

3 x - y = 1, 8 x + y = 10

x + y = 1, 2 x + y = 0

- 2 x + 3 y = 7, 3 x - y = 7

x + y = 48, x + 3 y = 28

What is x-3/5*y= 66/5 , 1/10*x+3/4*y=-87/20 ?
The solution to x-3/5*y= 66/5 , 1/10*x+3/4*y=-87/20 is x=9,y=-7