ACFG is a parallelogram, If AX = 4y + 3 and XF = 2y + 7, find AX.

Answer:
AX=XF
4y+3=2y+7
4y-2y=7-3
2y=4
y=2
then,
AX=4y+3
=4×2+3
=8+3
=11