## Elementary Geometry for College Students (5th Edition)

a.) 180$^{\circ}$-x$^{\circ}$ b.) 192$^{\circ}$-3x$^{\circ}$ c.) 180$^{\circ}$-2x$^{\circ}$-5y$^{\circ}$
To find the measure of the second of two supplementary angles you subtract the value of the given angle from 180$^{\circ}$.