#### Answer

$30x+10y=-25$

#### Work Step by Step

RECALL:
The standard form of a linear equation is
$Ax + By = C$,
where
A, B, and C are real numbers, and A and B are not both zero.
Write the given equation in standard form:
$\\3x+y=-2.5$.
To make all the coefficients integers, multiply both sides by 10:
$\\10(3x+y) = -2.5(10)
\\30x+10y=-25$.