help ASAP

$3+10x=-17$

Subtract 3 from both sides.

$10x=-20$

Divide both sides by 10.

$x=-2$

To prove it, plug back in.

$3+10(-2)=-17$

Multiply before you add.

$3-20=-17$

Simplify.

$-17=-17$

This is true, so x=-2.