What is y=-42+4x,4x+15y=-3 ?

The solution to y=-42+4x,4x+15y=-3 is x= 627/64 ,y=-45/16

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y=-42+4x,4x+15y=-3

y = - 42 + 4 x, 4 x + 15 y = - 3

x = \frac{627}{64}, y = - \frac{45}{16}

Solution steps

[y = - 42 + 4 x 4 x + 15 y = - 3]

Substitute

y = - 42 + 4 x

[4 x + 15 (- 42 + 4 x) = - 3]

Simplify

[64 x - 630 = - 3]

Isolate

x

for

64 x - 630 = - 3 : x = \frac{627}{64}

For

y = - 42 + 4 x

Substitute

x = \frac{627}{64}

y = - 42 + 4 \cdot \frac{627}{64}

- 42 + 4 \cdot \frac{627}{64} = - \frac{45}{16}

y = - \frac{45}{16}

The solutions to the system of equations are:

x = \frac{627}{64}, y = - \frac{45}{16}

3 x + 5 y = - 7, 3 x = y + 5

y = x + 5, 2 x + y = 47

9 x + 3 y = 2, 2 x + 2 y = 3

2 x + 3 y = 1, 0.63 x - 4 y = 4.1

4 x + 3 y = 8, 2 x + y = 2

What is y=-42+4x,4x+15y=-3 ?
The solution to y=-42+4x,4x+15y=-3 is x= 627/64 ,y=-45/16