Angle p and angle q are supplementary. if angle p = 2x and angle q = x-3, find x

Aflower has 26 chromosomes. to create a new flower, how many chromosomes would a sperm cell have? what is this process called? part 2: within a flower cell that has 26 chromosomes, how many chromosomes would a cell that is created within the stem of a flower as it grows, have? what is this process called?

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

Ineed on this question me get the answer