Question

(640÷ x ) + 32 = 40


490 ÷ ( 140-x)× 15=105



4800÷(a×5-560)= 120



( 360÷y)- 45=7274÷485

Answer 1

1) 640:х=40-32
640:х=8
х=80
2) 5а-560=4800:120
5а-560=40
5а=600
а=120