" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
2x+5 = 5x-7
5+7 = 5x-2x
12 = 3x
x = 12:3
x = 4
QR = 5x-7
QR = 5×4-7
QR = 20-7
QR = 13 cm