What is 0.4x-0.7y=-13,0.6x+0.7y=33 ?

The solution to 0.4x-0.7y=-13,0.6x+0.7y=33 is x=20,y=30

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0.4x-0.7y=-13,0.6x+0.7y=33

0.4 x - 0.7 y = - 13, 0.6 x + 0.7 y = 33

x = 20, y = 30

Solution steps

[0.4 x - 0.7 y = - 13 0.6 x + 0.7 y = 33]

Isolate

x

for

0.4 x - 0.7 y = - 13 : x = \frac{- 130 + 7 y}{4}

Substitute

x = \frac{- 130 + 7 y}{4}

[0.6 \cdot \frac{- 130 + 7 y}{4} + 0.7 y = 33]

Simplify

[- 19.5 + 1.75 y = 33]

Isolate

y

for

- 19.5 + 1.75 y = 33 : y = 30

For

x = \frac{- 130 + 7 y}{4}

Substitute

y = 30

x = \frac{- 130 + 7 \cdot 30}{4}

\frac{- 130 + 7 \cdot 30}{4} = 20

x = 20

The solutions to the system of equations are:

x = 20, y = 30

- 3 (2 x - 6) = 42, - 6 x + 18 = 42, - 6 x = 24, x = - 4

x + 1 = 3, x + 2 = x + 2

2 x + 3 y = 15, 4 x + 6 y = 24

4 x - 3 y = 5, 8 x + 6 y = 10

2 x + 7 y = 20, 3 x - 7 y = 4

What is 0.4x-0.7y=-13,0.6x+0.7y=33 ?
The solution to 0.4x-0.7y=-13,0.6x+0.7y=33 is x=20,y=30