Question

What’s the solution? 15 points!!

у — 15 = 3x
—2х + 5y = — 3

Answer 1

Answer as a decimal:
`\large\boxed{x = -4.59}`

Answer as a fraction:
`\large\boxed{x=-78/17}`

Explanation:

y - 15 = 3x

-2x + 5y = -3

Solve the first equation first to substitute into second equation

y - 15 = 3x

Add 15 to both sides of the equation

y = 3x + 15

Substitute this value of y into second equation

-2x + 5y = -3

2x + 5(3x + 15) = -3

Multiply

2x + 15x + 75 = -3

Add the x's

17x + 75 = -3

Subtract 75 from both sides of the equation

17x = -78

Divide both sides of the equation by 17

Answer as a decimal:
`\large\boxed{x = -4.59}`

Answer as a fraction:
`\large\boxed{x=-78/17}`

Hope this helps :)