In rhombus PQRS, with PR as the diagonal dividing it into triangles PRS and PRQ, angles SPR and QPR are given. Opposite angles in a rhombus are equal, so
is also

In the given rhombus PQRS, where PR is the diagonal dividing the rhombus into two triangles PRS and PRQ, you have angles SPR and QPR given as:
![\[ \angle SPR = 2x + 13 \]](https://img.qammunity.org/2024/formulas/mathematics/high-school/jg9eqxj2izm89u3o8l0jt3hx26e8claj75.png)
![\[ \angle QPR = 3x - 12 \]](https://img.qammunity.org/2024/formulas/mathematics/high-school/6u20zm91457n6yl5kw8iplr46j6nsdcwla.png)
In a rhombus, opposite angles are equal. Therefore,
is opposite to
, and
is also opposite to

![\[ \angle SPR = \angle SPQ \]](https://img.qammunity.org/2024/formulas/mathematics/high-school/dq7r3z8nrcqbzeyrcp0pk6uuyflgagneu8.png)
![\[ \angle QPR = \angle SPQ \]](https://img.qammunity.org/2024/formulas/mathematics/high-school/e2egi85qsvt8hvr3neh7bvstz32bmcqrur.png)
Since
are both opposite to
, they must be equal.
2x + 13 = 3x - 12
Now, solve for x:
13 + 12 = 3x - 2x
25 = x
Now that we have the value of x, substitute it back into either of the angle expressions. Let's use

![\[ \angle SPQ = 2x + 13 \]](https://img.qammunity.org/2024/formulas/mathematics/high-school/q11etpiwamxt9stvsxolz6u1wrkoyqcse1.png)
![\[ \angle SPQ = 2(25) + 13 \]](https://img.qammunity.org/2024/formulas/mathematics/high-school/2ws7a1ptb2rvlye54xa4sblysgi03iwz6x.png)
![\[ \angle SPQ = 50 + 13 \]](https://img.qammunity.org/2024/formulas/mathematics/high-school/h9puf2w78jsuitw5kyak8hmu2t05nhtb6l.png)
![\[ \angle SPQ = 63 \]](https://img.qammunity.org/2024/formulas/mathematics/high-school/ky9bnptkxojd16fcyc0176wn1fkbumb5vc.png)
Therefore,
