tolong di bantu ya kak no.1,2,dan 3!!

1.) a.) x = (3x-1) = (2x+1)
=3x-2x = 1+1
= x = 2cm
b.) y = 12 = (5y-3)
= 12+3 = 5y
= 15 = 5y
= y = 3 cm
c.) x² + y² = 2² + 3²= 4 + 9 = 13 cm